K,HI2y T 0CER0TlD.E. 115 



Quart. Journ. Geol. Soc. vol. xxiii. p. 216, that there is no possibi- 

 lity of determining to what species the type specimens of Cuvier's 

 R. leptorJiinus really belong, Christol's name is adopted for the 

 present species. 



There is no ossification in the narial septum. The upper cheek- 

 teeth very closely resemble those of R. leptorJiinus, but are generally 

 of larger size, and have a smoother enamel, with rather taller 

 crowns. The upper true molars (fig. 9) have a rather more decided 

 buttress, with a longer anterior cingulum ; and there are only two 

 " costse " on the premolars. The lower cheek-teeth have the outer 

 surface of the first crescent more rounded. Lower incisors are 

 frequently present. 



Hah. Europe (Pleistocene and Pliocene). 



40834. Cast of a somewhat crushed cranium, showing the normal 

 six cheek-teeth of either side, in a half-worn condition. 

 The original was obtained from the Upper Pliocene of 

 Lane-Lestang, near Moras (Drome), Prance ; and is pre- 

 served in the Natural History Museum at Lyons. The 

 left dentition is figured in ' Falconer's Pakeontological 

 Memoirs,' vol. ii. pi. xxxi. fig. 2 ; a smaller view of the 

 palatal aspect of the cranium being given in fig. 3 of the 

 same plate ; it is figured on a larger scale by Lortet and 

 Chantre, in the Arch. Mus. Lyon. vol. ii. pi. xvii. (1878). 

 Presented by C. Falconer, Esq., 1867. 



22020. The six right upper cheek-teeth ; from the Pleistocene of 



(Fig.) Grays, Essex. These specimens are described and figured 



by Boyd-Dawkins in the Nat. Hist. Rev. for 1865, p. 409, 



fig. 9, and noticed in ' Falconer's Pakeontological Memoirs/ 



vol. ii. p. 336. Purchased, 1847. 



22021. The associated left pm- 4 , m. 2 , and n^JJ, probably belonging 

 to the same individual as the preceding ; from the Pleisto- 

 cene of Grays. Purchased, 1847. 



18794, 19841, 19841 a, 22022. Four specimens of the second upper 

 true molar, three belonging to the left and one to the 

 right side ; from the Pleistocene of Grays. 



Purchased, 1845^47. 



18755, 18797, 19841 b, 20249. Four specimens of the fourth upper 

 premolar, three belonging to the right and one to the left 

 side; from the Pleistocene of Grays. 



Purchased, 1845-47. 

 i2 



