62 



GUIDE TO THE FOSSIL MAMMALS AND BIRDS. 



Pier-case 

 41. 



face, and as its neck was longer than that of a modern 

 elephant, it would be able to reach the ground with the front 

 of its mouth. The general shape of the animal is well shown 

 by a partially restored skeleton in the Paris Museum, of 

 which a photograph is placed on the wall near Pier-case 41 

 (see also Fig. oo). 



Fig. 55. — Skeleton of Tetrahelodon angiistidcns, from the ^liddle IMiocene 

 of Saasau, France; greatly reduced. (After A. Gaudry.) 



r 



I If* 



■p 



>- -. -H 



bj.^^^^H/'V 



Fig. 56. — Left upper milk-molars of Tctrahehdon longirostris, from the 

 Lower Pliocene of Eppelsheim, Hesse-Darmstadt ; nat. size. (After 

 A. Gaudrv.) 



Wall-ease 



43. 



Case C. 



Dinotherium, a contemporary of Tetrahelodon, with smaller, 

 simpler and more numerous grinding teeth, has the bony 

 symphysis of its mandible bent downwards and the terminal 

 lower tu.sks curved backwards. The only known skull of 

 this animal, with a plaster cast of the mandible (Fig. 57) 

 from the Lower Pliocene of Eppelsheim, Hesse-Darmstadt, 

 is mounted in a special Case marked C ; and teeth (Fig. 58) 



