RHIJSOCEROTID-E. 105 



18796. The well-worn fourth left upper premolar ; from the Pleis- 

 tocene of Grays. Purchased, 1845. 



20810. The well-worn fourth right upper premolar; from the 

 Pleistocene of Grays. Purchased, 1847. 



18755c. The fourth left upper premolar; from the Pleistocene of 

 Grays. Purchased, 1845. 



18795 a. The second right upper true molar ; from the Pleistocene 

 of the Thames Valley. Purchased, 1845. 



36770. The little-worn first or second right upper true molar ; from 

 {Fig.) the Pleistocene of Peckham, Surrey. Figured by Boyd- 



Dawkins in the Quart. Journ. Geol. Soc. vol. xxiii. pi. x. 

 fig. 5 (1867). Purchased, 1862. 



36771. The fourth right upper premolar, in an unworn condition ; 



from the Pleistocene of Peckham. Purchased, 1862. 



47647. The fourth right upper premolar ; from a cavern in Windmill 

 {Fig.) Hill, Gibraltar. Figured by Busk in the Trans. Zool. Soc. 



vol. x. pi. x. figs. 1-3, under the name of R. hemitcechus. 



The third costa is very strongly developed. 



Brome Collection. Presented, 1876. 



47647 a. The second or third right upper true molar, in a middle 



{Fig.) stage of wear. Figured by Busk, op. cit. pi. x. figs. 4, 5, 7, 



as R. hemitcechus. Brome Collection. Presented, 1876. 



47647 b. An imperfect first or second left upper true molar ; from 

 {Fig.) a cavern in Windmill Hill. Figured by Busk, op. cit. 

 pi. x. fig. 6, as R. hemitcechus. 



Brome Collection. Presented, 1876. 



45211. The inner half of a right upper premolar ; from the Pleisto- 

 cene of Ilford. Brady Collection. Purchased, 1878. 



18755 p. The first right upper milk-molar ; from the Pleistocene of 

 Grays. This specimen agrees with the one figured in 

 ' Falconer's Palaeontological Memoirs/ vol. ii. pi. xxv. 

 fig. 3, under the name of R. hemitcechus. 



Purchased, 1845. 



40806. Cast of part of a left maxilla, showing the first three milk- 

 molars, provisionally referred to this species. The original 

 is from the cavern of Lunel-Viel (Herault), France, and is 

 the type of Gervais's R. lunelensis. The teeth very closely 

 resemble those of a specimen of the present Bp< cies figured 



