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| Registros recuperados: 119 | |
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| Amshoff, G.J.H.. |
| In trying to prepare the account of the Myrtaceae for PULLE’s Flora of Suriname I soon found that a revision of the Myrtaceae of whole Guiana, especially of French Guiana, and preferably also of the Amazonian district, is necessary. The account would be of little value as long as our knowledge of the synonymy and the distribution of the species is so incomplete. The Myrtaceae of Guiana have been treated by BERG in Linnaea XXVII (1855—56) p. 1—512, XXIX (1858) p. 207—256 and XXX (1861) p. 647—713. Yet many species previously described from French Guiana, especially by AUBLET and by DE CANDOLLE, were not known to BERG. Moreover, BERG often based species on insufficient material, as has been pointed out by URBAN in his revision of the West Indian Myrtaceae in... |
| Tipo: Article / Letter to the editor |
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| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/534888 |
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| Bakker, D.. |
| Besides the Amathusiidae in the general collection the Rijksmuseum van Natuurlijke Historie at Leiden possesses a considerable number of representatives of the group, in excellently preserved specimens, in the collection of the late Mr. J. H. Jurriaanse. Moreover I could study the Amathusiidae in the collection of the Zoological Laboratory at Groningen, at present in the custody of the Leiden Museum. After I had completed my work at Leiden I had an opportunity to examine the material of the group in the Zoologisch Museum at Amsterdam, which, besides the general collection of the Society "Natura Artis Magistra" consists of the collections of the late Messrs. A. Mos and P. J. van den Bergh. In the following pages the different collections at Leiden are... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.75. |
| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/318219 |
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| Bayer, Ch.. |
| Genus Philippia Gray, 1847 Ph. abyssorum (Melvill & Standen) Solarium abyssorum Melvill & Standen, Ann. & Mag. of Nat. Hist., ser. 7, vol. 12, p. 297, pl. 21, fig. 1; 1903. Type locality: "Gulf of Oman, lat. 24º 58' N., long. 56º 54' E., 156 fathoms". This Philippia is related to Ph. oxytropis A. Ad. Ph. atkinsoni (Smith) Solarium atkinsoni Smith, Proc. Zool. Soc. London, p. 441, pl. 35, figs. 19, 19a, 19b; 1891. Architectonica atkinsoni, Hedley, Rec. Austral. Mus., vol. 6, p. 285; 1907. Type locality: "dredged off Sydney in 410 fathoms", "Station 164 B". Ph. certesi (Dautzenberg & Fischer) Solarium Certesi Dautzenberg & Fischer, Mém. Soc. Zool. France, vol. 9, p. 452, pl. 19, figs. 3, 4, 5; 1896. Solarium Certesi, Dautzenberg &... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.81. |
| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/318433 |
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| Beaufort, L.F. de. |
| It needs an explanation why among the botanical papers published in this volume to honour Mrs. Weber—van Bosse on her 90th birthday a zoological contribution has been inserted. Those who have read the curriculum vitae of this wellknown botanist in the foregoing pages of this volume will not wonder, for they know that she has been keenly interested for more than half a century in the zoological work of her late husband. And so among the chorus of botanists the voice of a zoologist could hardly be missed. For many years I have enjoyed the friendship of both, and I am grateful for this opportunity to show Mrs. Weber my affection and my admiration. When contemplating an adequate theme for this paper it occurred to me that in some way or other it had to dwell... |
| Tipo: Article / Letter to the editor |
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| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/526387 |
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| Beets, C.. |
| Die vorliegende Arbeit stellt ein ausführliches Resumé einer Arbeit in holländischer Sprache dar: „De geologie van het westelijk deel van het Heuvelland van Monferrato tusschen Turijn en Murisengo”, Dissert. Leiden, Augustus 1941 2). Das bearbeitete Gebiet ist bisher, namentlich in tektonischer Hinsicht, nur oberflächlich untersucht worden. Störungen wurden nie erwähnt, Profile waren nur spärlich vorhanden. Da sich die Stratigraphie als ausserordentlich interessant erwies, sobald die feineren Merkmale in einer Karte eingetragen wurden, wie es hier geschah 3), konnte zum ersten Mal ein Schema der sedimentären Genese für einen erheblichen Teil der Berge von Monferrato aufgestellt werden. |
| Tipo: Article / Letter to the editor |
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| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/505807 |
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| Beets, C.. |
| Bekanntlich hat K. Martin zweimal (1933, 1935, vgl. auch 1937) einige Mollusken aus dem angeblichen Oberoligocän der Insel Buton beschrieben, auf deren merkwürdige Charaktere er ausdrücklich hinwies. Ich selbst konnte seine Feststellungen an Hand reichlichen neueren Materials nur bestätigen und ergänzen 1): wenn man, es sei an dieser Stelle wiederholt, diese Molluskenfauna auf ihren Zusammenhang mit anderen Faunen hin prüft, so kommt man bald zu der Einsicht, dass zu anderen palaeogenen Faunen fast gar keine Beziehungen bestehen, jedenfalls nicht zu jenen benachbarter Erdteile (diese Verwandtschaftsbeziehungen sind vielleicht bloss Konvergenz-Beispiele); wirklich nahe Beziehungen bestehen nur zu der Neogenfauna nahegelegener Teile des ostindischen... |
| Tipo: Article / Letter to the editor |
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| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/505633 |
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| Beets, C.. |
| 1) Examining the Semper-collection of mollusca from the Philippines kept in the Leyden Geological Museum, I met with some generic undetermined specimens of a representative of the genus Atopodonta (from Tertiary strata only rarely recorded), all belonging to one and the same species, which appeared never to have been described before. This genus 1) is known from the Eocene of the Paris basin represented by two species, viz. the typespecies Atopodonta conformis (Deshayes), 1860 [Deshayes,. Anim. s. vert., I, p. 419, plate 28, fig. 14—16 (“Venus”); Cossmann, Catal. ill., I, 1886, p. (98— 100) 99, plate 6, fig. 3—6 (excl. plate 8, fig. 3—4)] and A. tapina Cossmann, 1886 (l.c., p. 100, plate 6, fig. 7—9). These are the only European species. In 1941 I was in a... |
| Tipo: Article / Letter to the editor |
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| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/505961 |
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| Beets, C.. |
| 1. Es sind bisher über die merkwürdige rezente marine Gastropoden-Gruppe Thatcheria Angas, 1877 sehr wenige Gegebenheiten bekannt, vergleichende Untersuchungen mit fossilen Arten fehlen (fast) vollkommen und auch die Frage ihrer systematischen Stellung ist nie in befriedigender Weise gelöst worden. Auf Grund vergleichender Forschungen bei der Bestimmung gewisser fossiler, systematisch schwieriger, doch morphologisch einfacher ostindischer Arten glaube ich diese Frage endlich — jedenfalls zum grössten Teil — lösen zu können, dank auch der von N.B. Eales ausgeführten anatomischen Untersuchung der einzigen lebenden Art dieser „Gattung”. Angas beschrieb 1877 eine Schale der hiesigen Art, Thatcheria mirabilis von Japan; er betrachtete sie vorläufig als Glied... |
| Tipo: Article / Letter to the editor |
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| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/505991 |
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| Beets, C.. |
| Diese Arbeit enthält die Beschreibung einiger neuer Arten aus den Asphaltgesteinen der Insel Buton, sowie Bemerkungen über schon bekannte Species. Wie überall im ostindischen Archipel ist auch hier K. Martin vorangegangen, indem er 1933 und 1935 insgesamt 35 neue Arten beschrieben und abgebildet hat; diese Anzahl hat sich jetzt bis auf 86 vermehrt. Die hier behandelten Fossilien empfing ich z. T. aus den Sammlungen des Geologischen Institutes der Universität Amsterdam; einen kleinen Teil dieser Sammlung hat Prof. H.A. Brouwer von der Direktion der „Mijnbouwmaatschappij Boeton” erhalten, ein anderer Teil wurde diesem geologischen Museum geschenkt von Herrn Dr. W.P. de Roever, dessen Vater, Herr J.W. de Roever, damals Inspektor der „Stoomvaart-Maatschappij... |
| Tipo: Article / Letter to the editor |
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| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/505965 |
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| Beets, C.. |
| Material: one well-preserved entire shell and another one, of which the ventral valve was destroyed for the greater part for the sake of chemical analysis in the „Rijkswegenbouw-Laboratorium”. Dimensions: the ventral valve of the holotype (fig. 9) has a length of 48.2 mm from the posterior or cardinal to the anterior border; the dorsal valve (fig. 8) is 45.2 mm long. The dorsal valve of the paratype (fig. 16) has a length of 53.8 mm. The breadth of the type is 49 mm, the thickness 32.6 mm. The habitus is more rhynchonelloid than terebratuloid, as e. g. in Gryphus Cubensis (Pourtalès) or Abyssothyris Thomson, 1927, or in some cretaceous groups (cf. Sahni, 1925). The shell is exactly bilaterally symmetrical, the ventral (pedicle-) valve being somewhat larger... |
| Tipo: Article / Letter to the editor |
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| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/505606 |
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| Beets, C.. |
| Bei unserer Untersuchung der Geologie des Turiner Beckens veranlasste uns die dort aufgefundene Tertiärsedimentation uns mit dieser faszinierenden Erscheinung näher zu beschäftigen. Schon früher haben sich eine Reihe von Forschern mit diesem Problem auseinandergesetzt, und man muss annehmen, dass die Einteilung der verschiedenen Schichtungsarten — sedimentäre Phänomene von höchster Bedeutung — am besten genetisch zu erfolgen hat, wie u. a. Kumm (20) und Brinkmann (7) es getan haben. Dazu zwingen uns auch die geologischen Verhältnisse, auf die wir an erster Stelle mit einigen Bemerkungen über das Tertiär der Turiner Berge eingehen wollen. Wir können hier nur kurz die wichtigsten Daten und Ansichten über die Entstehungsweise bestimmter Schichtenfolgen zur... |
| Tipo: Article / Letter to the editor |
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| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/505750 |
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| Beets, C.. |
| Man unterscheidet innerhalb der Anomalodesmata die interessante Gruppe röhrenbauender Pelecypoden Brechites Guettard, 1770 (= Aspergillum Lamarck, 1818), von denen etwa zwanzig Vertreter in der Jetztzeit ausschliesslich in den tropischen bis subtropischen Meeren der östlichen Halbkugel vorkommen. Diese Gattung ist in den tertiären und quartären Ablagerungen jener Gegenden nur spärlich repräsentiert, und es ist daher interessant, jetzt wieder eine Art dieser merkwürdigen Molluskengruppe vorliegen zu haben und zu beschreiben. Br. venustulus ist die zweite bisher beschriebene fossile Molluskenart vom nordwestlichen Borneo! Eine Uebersicht der wenigen bisher fossil beobachteten Arten gab Frl. Sieverts (1934: Foss. Brechiten a. d. ostind. Arch.1); man... |
| Tipo: Article / Letter to the editor |
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| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/505600 |
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| Beets, C.. |
| 1. Vorbemerkungen. Lange Zeit kannte man nur eine Art dieser interessanten Gattung aus dem Obereocän der Insel Java, nämlich Buccinulum jogjacartense (Martin) [Martin, 1914, S. 142]. Vor kurzem beschrieb dann Oostingh eine zweite javanische Art, nun aus dem Pliocän von Süd-Bantam (1939, S. 117). Inzwischen hatten aber Wanner und Hahn (1935, S. 250) zwei Arten dieser in der rezenten indopacifischen Fauna nicht vertretenen Gattung als eine Art beschrieben und sie ausserdem unter die Gattung Siphonalia eingereiht. Dank der Freundlichkeit von Herrn Prof. Wanner erhielt ich die Originale dieser Arten zwecks weiterer Untersuchung und konnte dabei feststellen, dass die Beschreibung, welche seinerzeit zwei Arten unter einer einzigen zusammenfasste, nicht... |
| Tipo: Article / Letter to the editor |
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| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/505999 |
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| Boeke, J.E.. |
| An attempt has been made to subdivide a very polymorphous plant species by means of a quantitative statistical method. This method has been based upon the following working hypothesis: 1° as some morphological characters of the material, concerning e. g. the shape of the leaves, the length of the pedicels etc., show an extremely great variation, each of these characters in every specimen at hand may be stated to be in one of three (one intermediate and two extreme) conditions; 2° if a character happens to be in an intermediate condition in a relatively great number of specimens the difference between the extreme conditions of that character may be considered insignificant from a taxonomical point of view; 3° the fewer characters of two or more specimens... |
| Tipo: Article / Letter to the editor |
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| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/526246 |
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| Børgesen, Frederik. |
| In a tube (no 282) containing several specimens of algae collected by Dr R. E. Vaughan, Curepipe, Mauritius, in quiet lagoons at Black River Bay a few specimens of a small delicate Griffithsia occurred as an epiphyte upon Laurencia papillosa (Forssk.) Grev. Since this plant has turned out to be a not previously described species it is a great pleasure to me on the occasion of Mme Dr A. Weber—van Bosse’s 90th birthday to name it in honour of her in the hope that Mme Weber will take it not only as a proof of my gratitude for a friendship extending over many years, but also as a token of my admiration for the important contribution made by Mme Weber to our knowledge of the tropical marine algal flora, especially by her great classic work ”Liste des Algues du... |
| Tipo: Article / Letter to the editor |
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| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/526364 |
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| Bremekamp, C.E.B.. |
| Among the Acanthaceae grown in the glasshouses of the University Botanic Garden, Utrecht, a plant labelled Aphelandra velutina drew my attention, first, because it obviously belonged to an entirely different genus, and secondly, because a description under this name could nowhere be found. The coincidence of these two grounds for bewilderment might be explained by assuming that Aphelandra was merely a perversion, probably caused by the inadvertency of a transcriber, of the true generic name. This sounded plausible enough, but the name itself could not be found, for all attempts to refer the plant to one of the existing genera failed. It looked as if the plant might have been described somewhere, but for the time being there was no indication at all as to... |
| Tipo: Article / Letter to the editor |
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| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/535020 |
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| Bremekamp, C.E.B.. |
| Among the most aberrant types of pollen grains found in plants which have been referred to the family Acanthaceae, are those of the genera Meyenia N. ab E. and Thomandersia Baill. Although the pollen grains were described by LINDAU under different names, those of the first genus as cogwheel-shaped and those of the latter as lenticular, they are really very similar: in both genera they are depressed globose, provided with five or more meridional grooves extending from the equator to about halfway the poles, and without clearly circumscribed germ pores. The difference between the two kinds of grains lies in the presence or absence of ribs: in Meyenia the grooves are borne on the top of ribs separated from each other by shallow depressions, whereas in... |
| Tipo: Article / Letter to the editor |
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| Ano: 1942 |
URL: http://www.repository.naturalis.nl/record/534928 |
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| Brieger,F. G.. |
| The object of the present paper is a study of the usefulness of two relative measures of variation, the well known coefficient oj variation and a new term proposed in this paper and called the index of variance. These terms are defined by the equations : coefficient of variation : σ% = s /v/v. 100 index of variance :σ/ √. 1. It is shown that, for theoretical reasons, only the index of variance may be expected to be constant. Six different experimental series actually proved this constancy, showing at the same time the variability of the coefficient of variation which proved to be dependent upon the respective mean. The coefficient of variation becomes approximately constant when the respective means are sufficiently distant from the absolute limit zero or... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1942 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051942000900001 |
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| Brieger,F. G.; Forster,R.. |
| The present paper gives some observations on the tumour formation and other abnormalities observed in the interspecific hybrids, Nicotiana glauca x N. Langsdorffii and N. glauca x N. Sanderae. Without entering into a detailed discussion of the literature and the various speculations proposed by Kostoff and Whitaker about the causes of tumour formations or on the relations between "spontaneous" and pathogenic tumours (Kostoff, Levine and others), two new observations are described. 1) The abnormalities in the two above mentioned hybrids are quite different. As already reported by other authors, the hybrids N. glauca x N. Langsdorffii are initially quite normal and vigorous, while tumours and other proliferations, on the stem, the stem base and the root... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1942 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051942000700002 |
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| Brieger,F. G.; Gurgel,J. T. A.. |
| The occurrence of polyembryonic seeds in Mangifera indica has been known for a long time, but nothing is known with reference to the forms cultivated in Brazil. It was found impossible to count the number of embryos in the seed, in spite of the size of both seed and embryo. But the cotyledons are in such a way twisted around each other that it is impossible to separate them. Thus it was necessary to take into acount only the embryos which were able to germinate and their number was determined after 3 and 7 months. It was necessary to dig up the seedlings and wash off all soil in order to distinguish ramifications of shoot and root from the actual polyembryony. In 7 months old seedlings a new complication arises owing to the complete fusion of their base.... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1942 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051942001200001 |
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| Registros recuperados: 119 | |
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