i 74 section b. vertebrata. 



3. Restoration of Extinct Vertebrates, from the 



American Museum of Natural History. 

 By Prof. H. F. Osbom. 



Several very artistic water-colour drawings purporting to be 

 life-representations of various extinct Reptiles and Mammals were 

 exhibited on the front table. 



These restorations constitute Nos. 20 — 24 of a series of water- 

 colours executed in the American Museum of Natural Histor)- by 

 Charles Knight. The ultimate object is to present leading types of 

 the extinct vertebrate succession, partly for purposes of popular 

 scientific instruction, partly as serious hypotheses relating to the 

 external form and colouring, pose and gait, feeding habits and sexual 

 characters. Every available source of knowledge is drawn upon to 

 render the restorations as scientifically accurate as possible. The 

 artist has travelled purposely to study the landscape conditions of 

 sub-tropical climates similar to that of the North American 

 Mesozoic and Tertiary. Extensive studies are also being made by 

 him in the Museums and Zoological Gardens of Europe, under the 

 advice and direction of the writer, to secure collateral information. 

 The criticism and advice of various specialists in Zoopalaeontology 

 are also sought. It is thus hoped to give this series of restorations 

 a permanent value and interest in the eyes of palaeontologists and 

 zoologists. The pictures now exhibited at the Congress are as 

 follows : — 



PJiejiacodns prinicBviis, executed from the remounted skeleton of 

 the famous type described by Cope. 



Corypliodon testis, a pair of Amblypods of the Wasatch or 

 Suessonian period, male and female, showing the sexual characters. 



Hoplophoneus prinKBviis, the Oligocene ancestor of the great 

 sabre-tooth cat, Machserodus. 



Teleoceras fossiger, the short-legged type of Rhinoceros, from 

 the Upper Miocene, characterized by the presence of a small horn 

 upon the tips of the nasals. 



Cainarasaiirus supremus, a group of great herbivorous Dino- 

 saurs, similar if not identical with the Brontosaiiriis of Marsh, 

 represented in a habitat resembling that of the St John's River, 

 Florida, as amphibious in habit. 



4. DE la structure SP^CIALE DES EPINES CHEZ les 



Apogonini et quelques autres poissons Acanthopt]£rv- 

 giens. 



Par M. Leon Vaillant, 



La constitution singuliere des epines chez les Apogon et les 

 Ambassis, dont je desire m'occuper aujourd'hui, n'est pas sans avoir 

 ete signalee, au moins iconographiquement. Dans son grand Atlas 

 d'Ichthyologie des Indes Xeerlandaises, dans dififerentes publications 



