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| Registros recuperados: 192 | |
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| Crandall, Lee S.. |
| When CHARLES CORDIER arrived from Costa Rica on October 9, 1942, bringing with him, among other great rarities, three Bare-necked Umbrella Birds (Cephalopterus ornatus glabricollis), it seemed to us that the mere possession of such fabulous creatures was satisfaction enough. True, they were not beautiful — some realists have even gone so far as to name them “ugly” — and like all Cotingas, they were definitely dull. But in spite of all, they really were Umbrella Birds and if we could solve the problem of their long term requirements, they must reveal to us much that had been unknown. For only once before, as far as we can learn, has an Umbrella Bird been kept in captivity in either Europe or North America. According to a note by FRANK FINN in ‘Avicultural... |
| Tipo: Article / Letter to the editor |
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| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/504418 |
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| Sitter, L.U. de; Sitter-Koomans, C.M. de. |
| In the Bergamasc Alps we have observed one major unconformity between the Basement rock and the overlying Permian. The total absence of any recognisable Palaeozoic sedimentary rocks accentuates this unconformity, and moreover this enormous hiatus makes the dating of any Palaeozoic event impossible. However, by comparison with the Central Alps and Kärnten, we learned that the Asturian orogenitic phase precedes the deposition of the first volcanic sediments. In analogy with the Aar and Gotthard masses we presumed the intrusion of the less metamorphic ortho rocks of the Basement, the granodiorite and the gneiss chiaro, to be of Upper Carboniferous age. The close resemblance of the chemical composition and differentiation of the Permian volcanic rocks and the... |
| Tipo: Article / Letter to the editor |
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| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/505987 |
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| Chabanaud, Paul. |
| Cynoglossus polytaenia (Bleeker). Zoölogisch Museum (Amsterdam), n° 1276. Coll. Laboratoire pour l’Exploration de la Mer (Batavia), près Penang. Longueur totale 117 mm. Longueur étalon 106 mm. Fig. 1. A première vue, la nageoire dorsale parait interrompue vers le milieu de sa longueur, sur une certaine distance; la lacune est comblée par une série de rayons, série dont les 2 extrémités s’étendent sur le côté nadiral (droit) de chacune des 2 fractions de la nageoire normale. La fraction antérieure de celle-ci se compose de 39 rayons; la fraction postérieure, de 66 rayons. |
| Tipo: Article / Letter to the editor |
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| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/504121 |
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| Lange, D. de. |
| 1. In Macroscelides (Elephantulus?) rozeti Duv., a North-African form, the pregnant uterus shows 3 swellings (sometimes this number is reduced to 1 or 2). The South-African form Elephantulus myurus Jamesoni, examined by prof. VAN DER HORST (Johannesburg) always shows two swellings, one in each half of the uterus horns. 2. The tuba is connected with a periovarial sac. 3. The eggs in the ampulla are naked and not surrounded by the zona pellucida. This causes sometimes the segmented cells to be set free. 4. The four-celled stage shows a tetrahedral arrangement. 5. In the uterus horn the unilaminar blastula is formed by the absorption of water. 6. In a stage of 120 cells the blastula-wall separates amoeboid cells into the interior forming a loose reticulum.... |
| Tipo: Article / Letter to the editor |
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| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/504025 |
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| Vervoort, W.. |
| The rich material of Copepods collected by the Snellius Expedition in the seas of the Eastern part of the Malay Archipelago was placed at my disposal in 1943 by Prof. Dr. H. Boschma. The material proved to be very interesting and contained, besides new species, many rare forms found for the first time in the Indo-pacific area. A report on the families Calanidae, Eucalanidae, Paracalanidae, and Pseudocalanidae will be published in Temminckia, vol. VIII, pp. 1-181. A report on the family Aetideidae was completed in 1946 but, as the printing difficulties created by the war have not yet sufficiently improved to warrant the publication of this report within a short time, it seems desirable to publish a preliminary account of some new or interesting forms.... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.74. |
| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/317660 |
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| Face, Louis. |
| Depuis longtemps certain aspect larvaire de nombreuses formes pélagiques faisant partie du plancton permanent a retenu l’attention des naturalistes et a conduit quelques-uns d’entre eux à considérer cette faune comme primitive. Si cette conclusion s’est par la suite avérée inexacte et si l’origine littorale de types planctoniques même les plus spécialisés, comme les Siphonophores par exemple (W. GARSTANG, 1946), a pu être mise en évidence, il n’en reste pas moins que cet aspect larvaire, qui avait frappé les premiers observateurs, demeure dans bien des cas évident. Sans doute, beaucoup de larves d’espéces benthiques mènent aussi, durant un temps plus ou moins long, une existence pélagique; et le fait que les constituants de ce plancton temporaire et du... |
| Tipo: Article / Letter to the editor |
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| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/504019 |
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| NN. |
| Baas Becking, L.G.M.: Notes on jungle trees I (Chron. Nat. 104, 1948, 271-277). Calculation of the age of the stand in the mountain forest reserve Tjibodas on Mt Gedeh, W. Java, by means of new measurements on the trees numbered by S.H. Koorders in 1890. By means of the losses (0.77% annually) the average life span of a tree is estimated at ca 130 years. Backer, C.A. c.s.: Beknopte Flora van Java (nooduitgave) afl. VII. Fam. XCLVIII-CLXXII. Rijksherbarium, Leiden. Sept. 1948. This instalment of the mimeographed emergency edition (in Dutch) contains the treatments of Meliaceae, Sapindaceae, Aceraceae, Sabiaceae, Staphyleaceae, Anacardiaceae, Connaraceae, Juglandaceae, Cornaceae, Alangiaceae, Nyssaceae, Araliaceae, Umbelliferae, Clethraceae, Ericaceae,... |
| Tipo: Article / Letter to the editor |
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| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/532951 |
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| Delsman, H.C.. |
| After having collected the plankton samples in the Java Sea on which I have reported in Treubia XVII, 1939, I thought it desirable to gather similar samples from a more oceanic area of the East Indian seas, in order to be able to make a comparison between the two collections and to try to find out the characteristic differences between the two regions. It seemed to me interesting to choose in the first place Sunda Strait for this purpose, as it connects the shallow Java Sea with the deep Indian Ocean and, therefore, might offer all degrees of transition from the plankton of the former to that of the latter. The next year, then, in 1933, I made a cruise in Sunda Strait in the months of April-May, the transition months between the (wet) west monsoon and the... |
| Tipo: Article / Letter to the editor |
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| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/504054 |
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| Diakonoff, A.. |
| The following notes on new synonymy of the species of South Asiatic Microlepidoptera of the families Tortricidae, Phaloniidae, Eucosmidae and Glyphipterygidae were made during a visit to the British Museum, Natural History, London, in 1946 and chiefly concern the material in the extensive collection of the late E. MEYRICK. A few additional new synonyms of Eucosmidae and of Carposinidae are not included and will be dealt with in another place. We are greatly obliged to the Trustees of the British Museum for the opportunity to study these collections, and also to Mr. W. H. T. TAMS, of the Division of Lepidoptera of that Museum, for his kind help and suggestions. |
| Tipo: Article / Letter to the editor |
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| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/504373 |
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| Buitendijk, C.F.A.. |
| While studying the small but interesting collection of Blattidae, submitted to me for study by Mr. C. Willemse of Eygelshoven (L.), I found a new Blattid for which I propose the name Hormetica luteomarginata nov. spec. The new species is represented in the Willemse collection by two male specimens. It belongs to the forms having the tegmina marked with black and the tegmina and wings extending beyond the apex of the abdomen. The most striking features are the fully developed tegmina and wings, the black band extending along the anal sulcus and the yellowly bordered black abdomen. Type ♂; Esperito Santo, Brazil (Willemse collection). Size medium for the genus, form moderately depressed, elliptical (fig. 1). Head in dorsal aspect not visible cephalad of... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.75. |
| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/318186 |
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| Sunier, A.L.J.. |
| De uitgave door het Koninklijk Zoölogisch Genootschap Natura Artis Magistra van een aflevering zijner Bijdragen tot de Dierkunde ter gelegenheid van het bereiken in 1949 van den 70-jarigen leeftijd door de huidige directeuren van het Zoölogisch Laboratorium en van het Zoölogisch Museum te Amsterdam, welke gemeentelijke instellingen beide gelegen zijn in den tuin van het Genootschap en gehuisvest zijn in gebouwen, die oorspronkelijk aan het Genootschap behoorden, is een ongezochte aanleiding eenige niet algemeen bekende feiten te memoreeren uit de ontwikkelingsgeschiedenis der Amsterdamsche combinatie: zoölogisch laboratorium, zoölogisch museum en zoölogische tuin. Artikel 1 der eerste Wet van het Koninklijk Zoölogisch Genootschap Natura Artis Magistra,... |
| Tipo: Article / Letter to the editor |
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| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/504048 |
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| Escher, B.G.. |
| Toen Cirillo Generelli in 1749 in de academic van Cremona een commentaar op de theorie van Lazzaro Moro (1687—1740) leverde, gaf hij te kennen, dat de geschiedenis der aarde zonder geweld, zonder verdichtsels, zonder veronderstellingen en zonder wonderen („senza violenze, senza finzioni, senza supposti, senza miracoli”), maar uitsluitend met behulp der tegenwoordige gebeurtenissen op aarde verklaard kan worden (Lyell, 1853, p. 37). Hij zal toen wel niet vermoed hebben, dat het nog tachtig jaren zou duren, voordat deze nieuwe zienswijze het geologische denken zou gaan beheerschen. Want eerst kwam Cuvier de klok terugzetten door in 1812 in het „Discours preliminaire” zijner „Recherches sur les ossements fossiles” (later gepubliceerd onder den naam „Discours... |
| Tipo: Article / Letter to the editor |
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| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/505794 |
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| Zabinski, J.. |
| It is notorious that the lycaon, the negro evil of plains, while by no means a declining race in Africa, has always been rare in Zoological Gardens. The reasons of this are twofold and closely interrelated. The animal presented some difficulties to rearing, readily perished and withal was not subject to reproduction in captivity and so there were no new born animals available for exchange between Zoological Gardens. Causes for the non resistance of lycaons under conditions of Europe are to be found less in climate differences between Europe and Africa — for the habitat of these plain animals to the South reaches far beyond the tropic of Capricorn — and so lycaons should not be excessively susceptibLe to the European climate and especially to temperature... |
| Tipo: Article / Letter to the editor |
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| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/504248 |
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| Brongersma-Sanders, Margaretha. |
| The number of fish remains occurring in fossil marine deposits varies within wide limits. In many deposits they are rather scarce, sometimes even wholly absent, whereas in some deposits they are common or abundant. According to DEECKE (1913, p. 90) they are scarce in many mesozoic marls, and they are wanting even completely in the devonian Helderberg and Oriskany beds and in the jurassic Opalinus and Renggeri clays. The deposits with a. great number of fish remains are divided by DEECKE into different groups. (The groups that refer to brackish and to supersaline water I shall leave out of consideration). The most important group is represented by certain finegrained sediments that probably were deposited near to the shore; very often these are shales... |
| Tipo: Article / Letter to the editor |
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| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/504435 |
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| Lieftinck, M.A.. |
| Weinig onderzoekingen hebben in zo wijde kring bekendheid verworven als die van onze landgenoot JAN SWAMMERDAM, die in zijn ,Ephemeri vita’ (1675) en later in de ,Bybel der Natuur of Historie der insekten’ (1737) de ontwikkelingsgeschiedenis beschreef van het beroemd geworden Oever-aas, Palingenia longicauda (Oliv.), de grootste palaearctische Ephemeride. Dit allermerkwaardigst insect, dat — het zij terloops opgemerkt — reeds in 1634 door de Amsterdamse medicus AUGERIUS CLUTIUS was beschreven en afgebeeld ¹), moet destijds in ons land alom de aandacht hebben getrokken wegens zijn massaal optreden gedurende een aantal warme dagen omstreeks het midden van de maand Juni. In Nederland echter is dit grote haft vermoedelijk reeds tegen het eind van de vorige... |
| Tipo: Article / Letter to the editor |
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| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/504443 |
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| Verwey, J.. |
| Our knowledge concerning the periodical movements in animals called migrations is chiefly based on observations on birds. By and by, however, a number of facts concerning migration in other animal groups have been assembled and it seems worth while to compare them with those known for birds. There is the more reason to do so here, because the victim of this jubilee is interested in birds and fishes alike. Though I shall not restrict myself to these two groups they will take more place than the rest. In the following I shall deal with North to South and South to North migrations chiefly. In the hope to succeed and make my ideas comprehensible to those who are not specially acquainted with this particular field I shall begin with a very short description of... |
| Tipo: Article / Letter to the editor |
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| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/504069 |
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| Slijper, E.J.. |
| 1. A review is given of some phenomena concerning pregnancy and parturition of the Cetacea, depending on data in literature and on observations made in Antarctic Blue and Fin Whales on board the f.f. “Willem Barendsz” (1946—1947). 2. In Mystacoceti the frequency of twins appears to be less than in man and the big domestic animals. The majority of twins is born by females that are longer than the average female in the period of greatest sexual activity. This does not mean, however, that just as in man most twins are born at an elder age than that corresponding with the maximum of sexual activity. It may also be possible that, just as in the big domestic animals, the ages correspond, but that twins are mostly produced by the physically stronger developed... |
| Tipo: Article / Letter to the editor |
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| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/503926 |
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| Karpiński, J.J.. |
| Les données historiques conservées, touchant les ours de la Forêt de Bialowieża, sont assez rares. BOBROWSKIJ cite un cas qui eut lieu le 3 décembre 1705. Auguste II de Saxe, roi de Pologne, alla chasser l’ours à la lance (il s’agit d’une lance spéciale dont l’extrémité est formée par deux dents). Blessé par la lance l’ours se précipita sur le roi et le saisit dans ses pattes. Grâce à sa force extraordinaire et à son agilité, le chasseur échappa cependant à la mort. |
| Tipo: Article / Letter to the editor |
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| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/504415 |
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| Bemmel, A.C.V. van. |
| Wanneer men bij een systematisch onderzoek van herten tracht om de soortsen raskenmerken vast te stellen, stuit men op moeilijkheden van velerlei aard. Om te beginnen zijn herten sexueel dimorph en vertonen zij bovendien een duidelijke periodiciteit, die samenhangt met de sexuele cyclus. De laatste uit zich onder meer in het periodiek afwerpen en regenereren van het gewei, klieractiviteit e.d. Daarnaast komt, merkwaardig genoeg ook bij tropische soorten, een seizoensvariatie voor, die zich vooral uit in kleur en toestand van het haarkleed. De sexueel-cyclische variatie en de seizoensvariatie gaan bij de soorten in gematigde streken hand in hand, omdat daar de sexuele cyclus aan het seizoen gebonden is. Bij tropische soorten is dit in veel mindere mate het... |
| Tipo: Article / Letter to the editor |
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| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/504086 |
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| Brongersma, L.D.. |
| In all snakes, the Boidae and Xenopeltidae excepted, only the right lung is well developed, while the left lung is rudimentary or absent (BUTLER, 1895). The right lung consists of an anterior alveolar part that is strongly vascularized, and of a posterior smooth-walled air-sac that is anangious. Between these two parts a transitional zone may be present, in which the wall of the lung shows a faint reticulate pattern, and which receives some very fine branches from the pulmonary vessels. In a number of snakes, among which the Viperidae, the situation becomes more complicated. In these snakes the membrane that connects the dorsal ends of the incomplete tracheal cartilages has become greatly expanded, and this dorsal wall has developed an alveolar structure.... |
| Tipo: Article / Letter to the editor |
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| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/504619 |
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| Registros recuperados: 192 | |
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