LEIDY'S OSTEOLOGY OF THE HEAD OF HIPPOPOTAMUS. 



213 



Tahle continued. 



Depth from condyle to angle --.... 



" " coronoid process to angle - - . . . 

 Transverse diameter of condyles -•.... 

 Breadth of inttrspace of the molar teeth - . . . 



Length of series of six upper molars . . . . . 



« " « lower " 



" exserted portion of superior canine 



" " " inferior " . . . . 



" " " superior mid incisors 



" " " " lateral incisors 



" " " inferior mid incisors - - - 



" " " " lateral incisors 



Distance between mid incisors above ..... 



" " " " below 



" " canines and incisors above .... 



" " " " below . - . . 



The animal referred to at the beginning of this memoir as having been described 

 by Dr. Morton,* from two skulls, under the name of Hippopotamus Liberiensis, 

 from St, Paul's river, Liberia, Africa, upon examination I find to possess so many 

 characters which do not belong to the two species of Hippopotamus designated in 

 the previous pages, that I have been induced to consider it as belonging to a distinct 

 genus of Hippopotamidae, for which the name Choeropsisf has been already proposed 

 in the Proceedings of the Academy. 



II. Capeiisis. 



H. amphihins. 



Male. 



Female. 



Male? 



Young 



Indies. 



Inches. 



Inches, 



Female? 



13 13 





11 



11 



14 13 







12 



12 



34 31 







3i 



3 



3i 8 







3 



— 



10^ 



9 



8i 



— 



11 10 



— 



9i 



— 



n 



2 



3i 



2J 



9J 13 



— 



5i 



— 



n 



3 



11 



— 



21 



1 



— 



— 



8 9 







4 







2J 31 







n 



— 



31 



31 



31 



— 



1 1 



— 



1 



— 



11 



H 



3 



— 



4 5|- 





11 



— 



CHGEROPSIS LIBERIENSIS, Leidy. 



Hippopotamus minor, Morton, Proc, Acad. Nat. Sc. vol. 2, p. 14 ; Duvernoij, 

 Comptes Rendus, t. 23, p. 650. 



Hippopotamus Liberiensis, Morton, Journ. Acad. Nat. Sci., n. s., vol. i., p. 232. 

 Choerodes| Liberiensis, Leidy, Proc. Acad. Nat. Sci., vi., 52. 



The materials in possession of the Academy of Natural Sciences of Philadelphia, 

 of this remarkable animal, are as follows : 



1. An imperfect skin of a nearly adult animal, from St. Paul's river, Africa. Pre- 

 sented by Dr. T. B. Wilson. 



The specimen, when received, was so much decayed from its having been wet, 

 that the taxidermist could not stuff it. The skin is black and hairless ; the ears are 

 twenty lines long, furnished with hairs on the inner surface. The snout is provided 

 with short bristles. The tail is Z\ inches long, compressed, and furnished with 

 bristles from one to two inches long. 



2. The entire skeleton belonging to the same individual as No. 1. When first 



* Pr. Acad. Nat Sci., ii. 14 ; Journ, Acad. Nat. Sci., n. s., i. 232. 

 t Pr. Acad. Nat. Sci., vi., No. III. 

 I Previously adopted for a genus of insects. 



54 



