PLIOLOPHUS 



325 



animal as long aud almost as large as a Lull ; but that the 

 workmen employed in the sandpit (sabloniere) preserved only 

 that one tooth. Both the lower molar from Harwich, and the 

 upper one from Soissons, indicate an animal of at least double 

 the size of the American tapir. 



Professor Hebert * has recently described a very instructive 

 series of teeth and bones from the oldest eocene deposits in 

 France, which he refers to the genus Corypliodon : the last 

 molar is identical in form with the tooth from the plastic clay 

 of Essex, on which the genus was originally founded. 



Genus Pliolophus, Ow. — The most complete and instruc- 

 tive example of a Mammal from the next overlying division of 

 the eocene tertiaries, viz., the "London clay," is that which 

 the writer has described f under the name of Pliolophus vidpi- 

 ceps. It is a hoofed Herbivore, but presents a dentition not 

 exhibited by any later or existing species of Mammal. 



The length of the skull (fig. 94) is 4 inches, its extreme 



Fig. 94. 

 Skull of Pliolophus vulpicepa (half nat. size), London clay. 



breadth 2 inches 2 lines, the height of the cranium opposite 

 the first premolar tooth 9 lines. Its shape and characteristics 



* Comptes Kendus de l'Acad. des Sciences, Paris, 26th January JS. r >7 (( 'orij- 

 phodon (hceiii, Hebert). 



f Quarterly Journal of the Geological Society, vol. xiw, p. 5 t 



