142 



UNGTJLATA. 



The skull of tie American B. megalodus (Cope) is figured in the 

 accompanying woodcut (fig. 16). 



Rhinoceros croizeti (Filhol l ). 

 Syn. (?) Aceratherium croizeti, Pomel 2 . 



Pomel's A. croizeti was described as being larger than It. minutus, 

 whereas the specimens described by Filhol (op. cit.) indicate a form 

 rather smaller 3 than Duvernoy's and Kaup's specimens of the latter. 

 As Pomel's description is too vague to be of any value it is better to 

 take the mandible figured by Filhol as the type ; the latter is from 

 St. Gerand-le-Puy, but it is stated that specimens from Qnercy 

 cannnot be specifically distinguished. The specimens in the Museum 

 show that there was no " crochet " or inner cingulum in the upper 

 true molars (fig. 17), nor any cingulum in the lower molars ; pmTT 

 is persistent in the mandible figured by Filhol. 



Hob. Prance. 



Fig. 17. 



Rhinoceros croizeti. — Upper true molars ; from the Upper Eocene of Each. \. 



M. 1732. Fragment of the left maxilla, containing m. 1 and £^2 



{Fig.) (woodcut, fig. 17) ; from the Upper-Eocene phosphorites of 



Bach, near Lalbenque (Lot), Prance. The length of m. 1 



is 0,034 and its width anteriorly 0,031, the corresponding 



dimensions of m^2 being 0,037 and 0,034. 



Purchased, 1884. 



M. 1729. Part of the mandible, showing mT~2 and m73 on the left 

 side; from the Upper Eocene of Eschamps, near Lalbenque. 



1 Ann. Sci. Geol. vol. xi. art. l,p. 1 (1880; vol. dated 3881) ; Aceratherium. 



2 Catalogue Methodique, p. 77 (1853). 



3 Pilhol says larger, but this is not borne out by his figures. 



