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| Registros recuperados: 192 | |
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| Schreuder, A.. |
| Lower-Villafranchian landmammals lived in the South of the Netherlands when the coastline of the North Sea retired in northern direction during the Plio-Pleistocene transition period. In the province of Zealand their black remains have been fished out of the waters of the Scheldt in the depth of which littoral Poederlian deposits (Amstelian deposits are missing there in Zealand) occur and are eroded by the currents. Also borings in the provinces of Limburg and Guelderland have yielded black fossils of this fauna of which the following species could be stated in the Netherlands: Eucladoceros falconeri (Dawk.), Odobenus huxleyi (Lank.), Alachtherium spec., Anancus arvernensis (Croiz. et Job.), Archidiskodon planifrons (Falc. & Caut.), Gazella schreuderae... |
| Tipo: Article / Letter to the editor |
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| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/504298 |
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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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| Wilde, J. de. |
| Etude expérimentale de la succession des générations chez le Doryphore (Leptinotarsa decemlineata Say). On a confirmé la presence d’une diapause vraie dans le cycle évolutif du Doryphore, diapause qui commence peu de temps après la mue imaginale. On peut, par une température et éclairage favorable, supprimer cette diapause en faveur de la réproduction. A 25-29° C. et éclairage continue de 3750 Lux, la suppression de la diapause a réussi pour 50 % des individus. La diapause est accélérée quand la température monte; la durée de la praediapause est doublée quand la température s’abaisse de 29° C à 15-25° C. La diapause imaginale du Doryphore diffère de la diapause nymphale des Lépidoptères en ce qui concerne l’influence d’une periode de froid. Une telle... |
| Tipo: Article / Letter to the editor |
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| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/504043 |
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| Ten Cate, J.. |
| On peut provoquer, chez différents animaux, les états d’akinésie expérimentale rapportés par la bibliographie sous le nom d’„hypnose animale”. Ces états ont été décrits pour la première fois par SCHENDTER en 1636, et par KIRCHER en 1646. On provoque, dans la plupart des cas, l’akinésie expérimentale en plaçant les animaux dans une position anormale dans laquelle on les maintient en réprimant toute tentative de leur part de reprendre la position normale et de s’enfuir. |
| Tipo: Article / Letter to the editor |
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| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/504026 |
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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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| Holthuis, L.B.. |
| The Isopod and Tanaidacean Crustacea of the Netherlands have not been treated as a whole since 1889, when Hoek published the second part of his Crustacea Neerlandica dealing with the Isopoda and Amphipoda. Hoek in this paper mentioned 25 species of Isopoda, 9 of which are marine forms, 1 a freshwater form and 15 terrestrial, no Dutch Tanaidacea were known to Hoek. At present we know 49 species of Dutch Isopoda, of which 20 are marine, 2 are freshwater forms and 27 are terrestrial, furthermore three species of Tanaidacea are known from this country. The present paper is an enumeration of all Dutch species of the two above mentioned groups, with their distribution within our country and, if necessary, with remarks on their synonymy and ecology. A volume on... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.74. |
| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/319226 |
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| Boschma, H.. |
| Certain Rhizocephalan parasites of the crabs Xanthias lamarcki (H. M. E.), Lybia tesselata (Latr.), and Glyptoxanthus vermiculatus (Lam.) mutually so closely correspond in all their characters that undoubtedly they belong to the same species. When the characters of this species are defined it appears that these practically correspond with the characters of Sacculina carpiliae Guér.-Gan. There are slight differences, not easily to define, and consequently not fit for a distinct specific description. Provisionally, therefore, the parasites of the crabs mentioned above are regarded as belonging to Sacculina carpiliae. The present paper contains notes on some specimens which undoubtedly belong to Sacculina carpiliae (parasites of Carpilius convexus (Rüpp.)),... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.74. |
| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/318460 |
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| Reventlow, Axel. |
| As far as I can recollect, only few reliable informations have been published concerning the total height and weight of new-born giraffe-calves; and as constant measuring of the growth of giraffes probably only in very few cases has been undertaken, I should like, by the following article, to contribute a little to the clearing of these matters. My opservations were made from March, 1939, until December, 1948, on 10 different giraffes whom I had the opportunity of studying at close quarters here in the Zoological Gardens of Copenhagen. On October 24th, 1915, we got a still-born giraffe-calf with a weight of 67,5 kg, the height unfortunately was not recorded. |
| Tipo: Article / Letter to the editor |
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| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/504530 |
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| Hediger, H.. |
| Inbezug auf ihren subjektiven Raum haben Tier und Mensch viel miteinander gemeinsam (vgl. HOLZAPFEL, 1943), vor allem das Bestreben nach einer deutlichen Abgrenzung, ferner die Art der Differenzierung und die ausgesprochene Tendenz zum Verharren (vgl. HEDIGER, 1946). Selbst in der modernen Wohnung finden wir eine Aufteilung, wie sie auch bei vielen Tieren vorkommt; es gibt Schlaf-, Ess-, Bade-, Vorrats-, Kotstellen usw. Nur einen Raumteil, der selbst in der primitivsten Eingeborenenhütte niemals fehlt, vermissen wir beim Tier grundsätzlich: die Feuerstelle. Hinsichtlich der Verbindungen zwischen den Örtlichkeiten mit speziell zugeordneten Funktionen hat von jeher nicht nur eine weitgehende Entsprechung bestanden, sondern zum Teil eine Überschneidung. Wohl... |
| Tipo: Article / Letter to the editor |
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| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/504104 |
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| Hooijer, D.A.. |
| The fossil elephant remains recently discovered in S. Celebes by Mr. H. R. van Heekeren, and entrusted to me by Prof. Dr. A. J. Bernet Kempers, Head of the Archaeological Survey of the Dutch East Indies, belong to a small form of the genus Archidiskodon. These specimens, described and figured in the present paper, give the first evidence of the existence of Proboscidea in the island of Celebes. As stated already in earlier notes on the fossils in Mr. Van Heekeren's collection (Hooijer, 1948a, 1948b, 1948c) this elephant is associated with a fauna containing a peculiar suid (Celebochoerus heekereni Hooijer), a babirusa (Babyrousa babyrussa beruensis Hooijer), an anoa (Anoa depressicornis (Smith) subsp.), and a gigantic land-tortoise (Testudo margae... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 38.22; 42.84. |
| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/318735 |
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| Vervoort, W.. |
| In the first months of 1941, whilst engaged with the study of Hydroids occurring along the coasts of the Netherlands, I received a small collection of Hydroids from Jersey for identification. These Hydroids, which were kindly sent to me by Mrs. W. S. S. van der Feen née van Benthem Jutting, curator at the Zoölogisch Museum at Amsterdam, had been collected by the late Mr. R. Oppenheim, a very studious amateur-naturalist, during a prolonged stay at Jersey from 1914-1918. Before his death Mr. Oppenheim placed a large number of fine drawings of Hydroids at my disposal, which were made during his stay at Jersey, where he had ample time and opportunities to study an extensive number of living Hydroids. Both drawings and Hydroids are now in the collections of the... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.72. |
| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/318328 |
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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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| Parker, H.W.. |
| The systematic status of the snakes recorded from the area has been reinvestigated, often in the light of new material. Allometric growth is shown to occur in several species and taxonomic errors arising from its previous non-recognition are rectified. The same feature is also used to determine the respective ontogenetic levels of closely allied forms. The fauna of the Sokotra group is shown to have greater relationships with the Palaearctic and Oriental regions than with the Ethiopian and to consist of mainly primitive types; they are assumed to have been isolated in the islands since the mid-Miocene. The mainland fauna, though predominantly Ethiopian, contains a strong northern admixture and this element predominates in the northern coastal plain which... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.82. |
| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/317866 |
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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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| Brouwer, A.. |
| Pollen analytical and geological investigations of the Lower and Middle Pleistocene in the Northern Netherlands. The Pleistocene deposits in the northern part of the Netherlands, form through their extreme thickness up to more than 300 m, a promising object for study from the stratigraphical point of view. The boulder clay of the penultimate glaciation lies in the province of Drente at or near the surface, but in northerly and westerly directions it dips away beneath Upper Pleistocene and Holocene deposits. The Pleistocene deposits below this boulder clay form the subject of the present paper. In the first chapter the existing opinions regarding the stratigraphy are briefly reviewed. Van Cappelle (1888, 1891, 1892a, 1892b) and Lorié (1887a, 1893, 1899)... |
| Tipo: Article / Letter to the editor |
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| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/506021 |
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| Heringa, G.C.; Kroon, D.B.; Neumann, H.; Ruyter, J.H.C.. |
| Bindweefsel is de naam van een familie van weefsels, welker gemeenschappelijke afkomst ligt in het mesenchym en welke tezamen gekarakteriseerd zijn door het bezit van meer of minder rijkelijke tussenstof tussen de cellen. Uit didactische overweging zijn we wel gewend de bindweefsels te onderscheiden in enerzijds zulke, welker functie in hoofdzaak bepaald wordt door de tussenstof, anderzijds zulks waarin de cellen de functiedraagsters zijn ¹). Als regel wordt dan vermeld, dat de eerstgenoemde groep (vezelbindweefsel, kraakbeen, been) in het organisme een mechanische taak vervult, terwijl de laatstgenoemde (reticulair bindweefsel, vetweefsel, bloed, weefsels, waarvoor de naam bindweefsel dus eigenlijk niet geldt) aandeel heeft in de stofwisseling. Dat deze... |
| Tipo: Article / Letter to the editor |
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| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/504167 |
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| Feen, P.J. van der. |
| If you ask the layman: “What is a museum?”, he will answer. “A museum is a display of objects, that have an aesthetic value or scientific interest; the scope of a museum is to improve the taste of the visitor, is to give him, by visual means, aesthetic or intellectual enjoyment, to satisfy his curiosity, to show him the true and real things (a classic sculpture, an Indian weapon or a deepsea fish) instead of a documentary film, a radio report, or the descriptions and pictures in his books and magazines.” If an architect is in charge of designing a museum, he will see to it that the wallcases and the free-standing objects receive the right light and that the public and the conditioned air can circulate freely. He will design an entrance hall, an exhibition... |
| Tipo: Article / Letter to the editor |
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| Ano: 1949 |
URL: http://www.repository.naturalis.nl/record/504163 |
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| Registros recuperados: 192 | |
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