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1. |
Coat Colour in Greyhounds |
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Proceedings of the Zoological Society of London,
Volume 93,
Issue 1,
1923,
Page 1-9
Adair Dighton,
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ISSN:0370-2774
DOI:10.1111/j.1096-3642.1923.tb02167.x
出版商:Blackwell Publishing Ltd
年代:1923
数据来源: WILEY
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2. |
A Note on the Zoæa of a Land‐Crab,Cardisoma armatum |
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Proceedings of the Zoological Society of London,
Volume 93,
Issue 1,
1923,
Page 11-14
H. Graham Cannon,
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ISSN:0370-2774
DOI:10.1111/j.1096-3642.1923.tb02168.x
出版商:Blackwell Publishing Ltd
年代:1923
数据来源: WILEY
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3. |
On the Linguatulid ArachnidRaillietiella furcocerca[Diesing, 1835] Sambon, 1922 |
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Proceedings of the Zoological Society of London,
Volume 93,
Issue 1,
1923,
Page 15-18
George S. Giglioli,
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ISSN:0370-2774
DOI:10.1111/j.1096-3642.1923.tb02169.x
出版商:Blackwell Publishing Ltd
年代:1923
数据来源: WILEY
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4. |
The Permian Fishes of the GenusAcentrophorus* |
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Proceedings of the Zoological Society of London,
Volume 93,
Issue 1,
1923,
Page 19-40
E. Leonard Gill,
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摘要:
Summary.The propriety of placingAcentrophorusin the family Semionotidæ was not in doubt, but it is amply confirmed by the additional information now brought forward. In the exact correspondence of the dorsal and anal fin‐rays with their endoskeletal supports, in the reduced maxilla, the narrow preoperculum and the whole plan of the opercular apparatus, in the absence of an infra‐clavicle as in all the details of the pectoral arch and the pelvic bones,Acentrophorusis a characteristic representative of the Protospondyli and of the family Semionotidæ.At the same time,Acentrophorusdoes in, certain respects retain primitive characters. It seems, in fact, to provide us with something that is comparatively rarely found among fossil fishes, namely a really early representative of a new group which still shows definite traces of its origin from older types. The most striking character of this kind inAcentrophorusis undoubtedly the upper caudal lobe. As compared with the caudal lobe of the contemporary Palæoniscids it is certainly greatly reduced, but the reduction is only in depth; the caudal lobe ofAcentrophorusis still of the maximum length. It is interesting to find in another contemporary fish, the extraordinary formDorypterus hoffmanni, a caudal lobe in precisely the same stage of reduction, except that, in place of the single line of scales found inAcentrophorus, the lobe is marked externally to the very tip by two lines, the scales as they are traced backwards becoming linear and almost microscopic. That a stage such as this—the caudal lobe extremely attenuated in its hinder portion but still more or less of the full length—may have been passed through pretty regularly in the production of a “hemi‐heterocercal” tail is suggested not only by the parallelism betweenAcentrophorusandDorypterus, but also by at least one fact of fossil ontogeny. A young example ofDapedius, 9 cm. long and beautifully preserved (text‐fig. 16), which has been kindly lent me by Prof, D. M. S. Watson, has a caudal lobe extending just two‐thirds the length of the upper border of the tail, instead of only one‐third as in the adult; and for some distance towards its apex the lobe is marked by a single line of very small and narrow scales.The head ofAcentrophorusalso, though in side view almost entirely typical of a Semionotid, shows when seen from above (text‐fig. 3) some decided primitive traits. The shape of the frontal shield and of the supratemporals, and the large leaf‐shaped post‐temporals, are all strongly reminiscent ofPalæoniscus. So also is the internal pattern and articulation of the scales, especially in the earliest species,A. glaphyrus.On the other hand, there are certain points in the structure ofAcentrophoruswhich seem to be peculiar to this genus among the Semionotidæ. The orbit is very large and encircled by only a single chain of bones; the scales, compared with those of other Semionotids, are thin, deeply overlapping and of unusual range of difference in size, and do not produce the typical “tessellated pavement” effect; the fin‐fulcra in the later species are of particularly massive form; the pectoral fin is placed higher on the flank than in other fusiform Semionotids, and its attachment gives it a peculiarly “modern” appearance. Fused frontals are also unusual in the family; and of the characters of the axial skeleton which are shown clearly enough to be worth discussion, the expanded neural spines under the dorsal fin and the great size of the supports of the anal fin‐rays seem to be quite peculiar toAcentrophorus.In view of all these primitive and individual characters it can no longer be said thatAcentrophorusdiffers fromSemionotusonly in lacking the median row of acuminate scales in advance of the dorsal fin. It is seen to be very much the most primitive known member of the family Semionotidæ, and is therefore difficult to incorporate in any scheme on which the genera may be classified. On the whole, however, it would appear to be nearest to the line of ancestry ofLepidotus. Such a relationship is suggested in many points, in particular in the shape of most of the tins and in other details of their structure, in the excavation of the back along the base of the dorsal fin, and in the tendency towards a tritoral form exhibited by the teeth on the vomers.My thanks are due to Prof. D. M. S. Watson, who first suggested the desirability of re‐examining the material ofAcentrophorusin the Hancock Museum at Newcastle; to Mr. J. A. Charlton Deas and Mr. T. R. Goddard for giving me facilities for studying some fine specimens in the Sunderland Museum; and to Dr.
ISSN:0370-2774
DOI:10.1111/j.1096-3642.1923.tb02170.x
出版商:Blackwell Publishing Ltd
年代:1923
数据来源: WILEY
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5. |
The Postorbital Articulation of the Palatoquadrate with the Neurocranium in the Cœlacanthid Fishes |
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Proceedings of the Zoological Society of London,
Volume 93,
Issue 1,
1923,
Page 41-58
Edward Phelps Allis,
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ISSN:0370-2774
DOI:10.1111/j.1096-3642.1923.tb02171.x
出版商:Blackwell Publishing Ltd
年代:1923
数据来源: WILEY
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6. |
Some Microfilariæ found in the Blood of Birds dying in the Zoological Gardens, 1920–1921 |
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Proceedings of the Zoological Society of London,
Volume 93,
Issue 1,
1923,
Page 59-64
Rita Markbreiter,
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ISSN:0370-2774
DOI:10.1111/j.1096-3642.1923.tb02172.x
出版商:Blackwell Publishing Ltd
年代:1923
数据来源: WILEY
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7. |
On the Vagus and Sympathetic Nerves of the Terrestrial Carnivora |
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Proceedings of the Zoological Society of London,
Volume 93,
Issue 1,
1923,
Page 65-83
Charles F. Sonntag,
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ISSN:0370-2774
DOI:10.1111/j.1096-3642.1923.tb02173.x
出版商:Blackwell Publishing Ltd
年代:1923
数据来源: WILEY
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8. |
Remarks on some Palearctic Bears |
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Proceedings of the Zoological Society of London,
Volume 93,
Issue 1,
1923,
Page 85-95
Einar Lönnberg,
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ISSN:0370-2774
DOI:10.1111/j.1096-3642.1923.tb02174.x
出版商:Blackwell Publishing Ltd
年代:1923
数据来源: WILEY
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9. |
Some Notes onLeander longirostrisM. Edwards, and other British Prawns |
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Proceedings of the Zoological Society of London,
Volume 93,
Issue 1,
1923,
Page 97-123
Robert Gurney,
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ISSN:0370-2774
DOI:10.1111/j.1096-3642.1923.tb02175.x
出版商:Blackwell Publishing Ltd
年代:1923
数据来源: WILEY
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10. |
Report on the Deaths which occurred in the Society's Gardens during 1922 |
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Proceedings of the Zoological Society of London,
Volume 93,
Issue 1,
1923,
Page 125-128
N. S. Lucas,
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ISSN:0370-2774
DOI:10.1111/j.1096-3642.1923.tb02176.x
出版商:Blackwell Publishing Ltd
年代:1923
数据来源: WILEY
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