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| Registros recuperados: 220 | |
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| Stolk, Anth.. |
| The problem of the retardation of the processes of growth and differentiation is certainly as important as the processes of growth and differentiation themselves. It is striking, therefore, that whereas the analysis of growth has been carried out for a considerable period of time already, the analysis of inhibition was only commenced a few decades ago. It has to be admitted that Wiesner (1894) succeeded in demonstrating the presence of a substance retarding germination in the slime of the mistletoe (Viscum album), but this remained a solitary observation for some time. About 1920 a series of important publications appeared which deal with inhibiting substances. Oppenheimer (1922) discovered a substance of this kind in the fruit pulp of ripe tomatoes,... |
| Tipo: Article / Letter to the editor |
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| Ano: 1954 |
URL: http://www.repository.naturalis.nl/record/504839 |
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| Nouvel, H.. |
| Faculté des Sciences de Toulouse, Laboratoire de Biologie générale. Monsieur L. B. Holthuis m'avait demandé de bien vouloir examiner un petit lot de Mesopodopsis provenant de Ceylan (lagune d'eau saumâtre, Bolgoda) et transmis au «Rijksmuseum van Natuurlijke Historie, Leiden» par «the Fisheries Research Station, Colombo». Je m'attendais à y reconnaître Mesopodopsis orientalis (Tattersall 1908), la seule espèce du genre connue de la région indo-pacifique et précisément des côtes indiennes, depuis Goa jusqu'au delà du delta du Gange. Or il s'ag:t d'une espèce nouvelle, bien différente de M. orientalis et plus proche des deux autres espèces du genre: M. slabberi (P. J. van Beneden 1861), soigneusement redécrite et figurée par G. O. Sars (1877) et M. africana,... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.74. |
| Ano: 1954 |
URL: http://www.repository.naturalis.nl/record/318208 |
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| Maas Geesteranus, R.A.. |
| In Madroño (1936) Herre has lamented the disappearance of lichen species through the disastrous interference of man. Unavoidably, the advance of civilised modern life is linked with destruction of the vegetation. This applies all the more as the endangered area is more densely populated and it certainly applies most alarmingly to the lichen flora of the Netherlands. Here, every way-side tree felled is an irreparable loss to the epiphytic lichen communities, every acre of heath burnt or turned into arable land is a blow to our stock of terrestrial lichen species, whereas the use of dry fertilisers and the spraying of orchards are very effective in killing any lichen in the neighbourhood that otherwise might have survived. A comparison of the material... |
| Tipo: Article / Letter to the editor |
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| Ano: 1954 |
URL: http://www.repository.naturalis.nl/record/526283 |
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| Eisner, C.. |
| In seiner Behandlung der Gattung Archon Hb. im Tierreich „Lepidoptera pars I" kommt Bryk am Schluss seiner Betrachtungen zu der Feststellung, dass sich die geographischen „Formen" (subspecies?) in drei Gruppen zusammenfassen lassen. Unbestreitbar sind davon der „bellargus-Kreis" und der Rassenkreis, der die verschiedenen subspecies aus Pontus und Armenien beheimatet. Unklar ist die dritte Gruppe, zu der Bryk A. apollinus Herbst und subsp. thracica Buresch vereinigt. Die Diagnosen, die Bryk für die verschiedenen Rassen gibt, zwingen mich, da ich sein tiefes Wissen von allem und sein Feingefühl für alles, was mit Parnassxus zu tun hat, kenne, zu der Annahme, dass ihm ein zu beschränktes oder unzuverlässiges Material bei seiner Arbeit zu Verfügung gestanden... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.75. |
| Ano: 1954 |
URL: http://www.repository.naturalis.nl/record/318848 |
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| Stock, J.H.. |
| While engaged on working out the beautiful pycnogonid material dredged by Dr Th. Mortensen in shallow waters near the Virgin Islands, I thought it useful to compare this dredged material with material collected between the tide marks, or just below the low tide line. So I was very glad to meet Dr P. Wagenaar Hummelinck, who has made extensive collections of littoral marine animals during his various trips to the West Indies, and who kindly entrusted me with about 50 lots of pycnogonids which had already been sorted from his material. A definitive paper will be published as soon as his entire marine material has been searched for the presence of sea spiders. |
| Tipo: Article / Letter to the editor |
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| Ano: 1954 |
URL: http://www.repository.naturalis.nl/record/506112 |
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| Docters van Leeuwen, W.M.. |
| 1 began my investigations about the galls of the Loranthaceae in Salatiga in 1908 and continued this work in Samarang from 1909 to 1915. Here I also examined the germination of the seeds. From 1915—1918 I stayed in Bandung where I had little opportunity to continue my investigations. From 1918—1932 I lived in Buitenzorg (Bogor) where I could resume my studies on the Loranthaceae, not only as to the germination of the seeds, but also the pollination of the flowers. For this purpose I sowed many species of Loranthaceae on shrubs in the neighbourhood of my home, so that I could easily check the development and had ample material at my disposal. The investigations were hampered by the chaotic conditions of the systematics of the Indomalayan Loranthaceae in... |
| Tipo: Article / Letter to the editor |
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| Ano: 1954 |
URL: http://www.repository.naturalis.nl/record/505056 |
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| Andreas, Che.H.; Prop, N.. |
| A study has been made of the Indo-Malaysian species of Cnestis. The mutual length ratio of sepals and petals, — brevi- and aequipetaly —, is the main differentiating character for the species; there are no transitions. The areas of distribution overlap in the Malay Peninsula (fig. 1); brevipetalous types are known from the Malay Peninsula, Sumatra, Borneo and Celebes, aequipetalous types from Burma, Siam, Indo-China and the Andaman Islands, the Malay Peninsula and the Philippines. Fruits are of two different shapes: beaked in aequipetalae of the Andamans, Burma, Siam, and Indo-China, pear-shaped in remaining aequipetalae and in brevipetalae. Leaves tend to be longer and jugae more numerous in brevipetalae than in aequipetalae. Other characters do not have... |
| Tipo: Article / Letter to the editor |
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| Ano: 1954 |
URL: http://www.repository.naturalis.nl/record/524575 |
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| Kaas, P.. |
| In June 1951 Dr. A. R. Ranjha of the Zoological Survey Department, Government of Pakistan, at Karachi, sent me 26 samples of Loricata, together 46 specimens, preserved in 75% rectified spirit, all, except one, from the rockey beach of Manora Island, about two miles West off the Karachi coast, where they had been collected from the tidal area at low tide. The samples were taken at different dates and by several collectors or collecting parties. There are four species and one variety among the material, of which three species and the variety are supposed to be new. Chiton iatricus Winckworth, 1930 Winckworth, R., 1930. Description of a new Chiton from Karachi. Proc. Malac. Soc. London, vol. 19, pp. 78-80, pl. 8b. Material examined: 200 yards W. of Mandir,... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.73. |
| Ano: 1954 |
URL: http://www.repository.naturalis.nl/record/319177 |
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| Holthuis, L.B.. |
| For about half a year (February-July, 1953) Dr. M. Boeseman, curator of Fishes of the Rijksmuseum van Natuurlijke Historie, was the guest of the Instituto Tropical de Investigaciones Científicas at San Salvador. During this time Dr. Boeseman made extensive collections in numerous localities throughout the Republic of El Salvador and, though his main attention was directed towards the fishes, an interesting collection of Decapod Crustacea was collected and sent home to Leiden. This collection forms the main subject of the present paper. As Dr. G. Kruseman, curator of Insects of the Zoological Museum at Amsterdam, collected some Decapoda in the same region during his stay in El Salvador in the summer of 1952, this material also is included in the present... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.74. |
| Ano: 1954 |
URL: http://www.repository.naturalis.nl/record/317674 |
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| Husson, A.M.. |
| The present paper is based on a collection of bats from Tobago brought together by Mr. G. F. Mees. From July 1953 to March 1954 Mr. Mees stayed at the island of Trinidad, making occasional short visits to Tobago. Though his main attention was directed to the avifauna of these islands, he collected also several specimens of bats, those from Tobago being of special interest. The larger part of this material has been obtained by shooting. After collecting the specimens were immediately placed in a refrigerator and were sent in a frozen condition to the Leiden Museum, where they finally were prepared. I want to express here my sincere gratitude to Mr. Mees for his willingness to devote part of the time spent by him in the West Indies to the collecting of bats,... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.84. |
| Ano: 1954 |
URL: http://www.repository.naturalis.nl/record/319267 |
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| Bruggen, A.C. van. |
| In the course of the year 1954 I received for identification a little Nematoceron belonging to the family Lycoriidae (Sciaridae). After a careful examination of the material and the literature I arrived at the conclusion that my specimens represented a hitherto undescribed species. It belongs to the genus Neosciara Pettey, 1918 (sensu Lengersdorf, 1930 and Frey, 1942). There is some confusion about the naming and delimitation of the genera in the subfamily Lycoriinae. The four most important opinions are : I. Lengersdorf (1930) : Genus Lycoria Meigen, 1800, syn. Saara Meigen, 1803, Gruppe I (no name, veins cu and m with bristles) and Gruppe II Neosciara Pettey, 1918 (cu and m bare). II. Séguy (1940) : Genus Lycoria Meigen, 1800 (cu and m with bristles) and... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.75. |
| Ano: 1954 |
URL: http://www.repository.naturalis.nl/record/318372 |
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| Steenis, C.G.G.J. van. |
| Exbucklandia R. W. Brown ( Bucklandia R. Br. non Pr. ex Sternb., Symingtonia Steen.) In an article on “Alterations in some fossil and living floras” (J. Wash. Ac. Sc. 36: 348. Oct. 1946) R. W. Brown proposed the new generic name Exbucklandia for the Hamamelidaceous genus Bucklandia R. Br., non Pr. ex Sternb., while describing a new fossil species from the United States. He also transferred B. populnea to the new genus. Unfortunately I had overlooked this publication when proposing Symingtonia to replace Bucklandia R. Br. (Acta Bot. Neerl. 1: 443—444. 1952). Exbucklandia will have to be accepted for it in future. The Indo-Chinese species B. tonkinensis Lecomte should be referred to as Exbucklandia tonkinensis (Lecomte) Steen. comb. nov. I have to thank Dr... |
| Tipo: Article / Letter to the editor |
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| Ano: 1954 |
URL: http://www.repository.naturalis.nl/record/524744 |
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| Sleumer, H.. |
| Casearia amplectens Sleum. sp. nov. — Arbuscula 1.5 m alta; ramulornm apicibus dense breviter flavido-pilosis, partibus vetustioribus cito glabratis corticeque cinerascenti obtectis. Folia elliptico-oblonga vel oblonga, apicem versus breviter (1—2 cm) subcaudato-acuminata, apice ipso paullo falcato obtusa, basi late cuneata fere rotundata, inferiora usque ad 2 mm longe petiolata, superiora subsessilia, membranacea, arcte pellucido-punctata et -lineata, petiolo, costa nervisque subtus brevissime pilosulis exceptis glabra, in sicco brunnescentia, utrinque opaca, regulariter crenato-serrata (dentibus obtusiusculis glandula terminatis 1 mm altis et c. 3—6 mm distantibus), 9—15 cm longa, 4—4.5 cm lata, costa utrinque elevata, nervis lateralibus utroque latere... |
| Tipo: Article / Letter to the editor |
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| Ano: 1954 |
URL: http://www.repository.naturalis.nl/record/524553 |
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| Eisner, C.. |
| Unter diesem Titel, indessen mit dem Zusatz „unter Benutzung des Materials der Kollektion Eisner, Dahlem" — die Sammlung befindet sich z.Zt. im Rijksmuseum van Natuurlijke Historie, Leiden — haben mein Freund Felix Bryk und ich die Gruppen Parnassius mnemosyne L., P. stubbendorfi Ménétr., P. eversmanni Ménétr., P. nordmanni Ménétr., P. clarius Eversm., P. clodius Ménétr., P. Orleans Ch. Oberth., P. apollonius Eversm., P. honrathi Staud. und A. Bang-Haas, P. bremeri Bremer, P. phoebus F., P. actius Eversm., P. jacquemontii Boisd., P. epaphus Ch. Oberth., P. tianschanicus Ch. Oberth., P. nomion Hb. und einen Teil von P. apollo L. kritisch bearbeitet, bis die Entwicklung der politischen Verhältnisse in Deutschland die weitere Herausgabe der „Parnassiana"... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.75. |
| Ano: 1954 |
URL: http://www.repository.naturalis.nl/record/319187 |
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| Eisner, C.. |
| Viele Sammler rümpfen die Nase über die Benennung von Formen. Deren Festhaltung ist indessen wichtig, um einen Überblick über die Variabilitätsbreite einer Species zu geben ; ein weiterer Vorteil der dadurch erhaltenen Übersicht ist, dass er es dem Systematiker leichter macht, die für eine subspecies characteristischen Merkmale innerhalb der Variabilitätsmöglichkeit der species festzulegen. Aus dieser Anschauung heraus benenne ich die folgenden Formen: Luehdorfia puziloi Ersch. cf f. pallida (m.). Grundfarbe des cf weissgelb, wie sie sonst nur ? zeigen. Patria : Sutschanski-Rudnik, Ussuri, ι cf Typus. subsp. coreana Mats. f. fasciata (m.). ι cf mit im Hinterflügel einer continuierlichen Binde vom Wurzelfelde über Mittelzelle nach dem unteren Ende der... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.75. |
| Ano: 1954 |
URL: http://www.repository.naturalis.nl/record/317923 |
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| Reyne, A.. |
| In the taxonomy of Coccoidea or scale insects much confusion is due to an insufficient knowledge of the type species of several genera. Especially our knowledge of some of the older genera is very incomplete, as the descriptions of their type species are extremely short and superficial from the modern point of view. The type specimens, on which the original descriptions of the genera were based, are distributed over several museums in all parts of the world; in some cases type material is no longer in existence, and as far as available it is seldom lent to persons in foreign countries. In consequence of this we have often to rely on the original description, as the type material is not available for examination. Signoret (Essai sur les Cochenilles,... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.75. |
| Ano: 1954 |
URL: http://www.repository.naturalis.nl/record/318936 |
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| Regteren Altena, C.O. van. |
| Parmi les limaces non-identifiées du Musée Zoologique d’Amsterdam, que M. le Professeur Dr. H. Engel et Mme. W. S. S. van der Feen née van Benthem Jutting ont bien voulu me permettre d’étudier, il se trouvait une espèce nouvelle dont je donne ci-après la description. Gigantomilax (Turcomilax) iliensis nov. spec. Matériel étudié: un specimen en alcool (holotype), environs de Kouldja, Chine, 2.IX.1924, W. Beick. leg. |
| Tipo: Article / Letter to the editor |
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| Ano: 1954 |
URL: http://www.repository.naturalis.nl/record/504859 |
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| Lam, H.J.; Barkman, J.J.; Ooststroom, S.J. van; Soest, J.L. van. |
| This charming and handy book printed on excellent paper, with its numerous clear pictures of well-known Malayan plants, reminds one in many ways of Merrill’s “Plant Life of the Pacific World” (MacMillan 1946, New York), which has perhaps served Prof. Holttum as an example. Its size being only slightly smaller than Merrill’s book and the area covered being very considerably smaller, its descriptions of plants are naturally more detailed; the more so as only a choice has been made, in which the special interests of the author — ferns, orchids, gingers — are evident though not predominant. The plants described are not regionally arranged. The 17 chapters are rather headed by names of life-forms, striking organs, and special habitats. As is pointed out in the... |
| Tipo: Article / Letter to the editor |
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| Ano: 1954 |
URL: http://www.repository.naturalis.nl/record/524743 |
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| Werff, A. van der. |
| In 1934 Dr van Steenis recorded Elisma natans (L.) Buch. for the first time outside Europe, viz. from Java. This unusual record was based on a single specimen collected in 1932 by Dr A. Kleinhoonte in Central Java at 2000 m altitude on Mt Diëng, now preserved in the Herbarium Bogoriense. Miss Kleinhoonte assumed there was little doubt that she had collected it in Java. After having collected information from the Fisheries Department in Java, that no Elisma was ever planted by that Service, Dr van Steenis stated (1, p. 175): “Though it is a waterplant, I cannot account for this enormous discontinuity.” A year later (2, p. 55) he gave a figure of the specimen and concluded that he felt forced to accept the species as a native of Java. However, he nursed a... |
| Tipo: Article / Letter to the editor |
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| Ano: 1954 |
URL: http://www.repository.naturalis.nl/record/526002 |
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| Registros recuperados: 220 | |
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