102 



TJNGULATA. 



of the upper true molars. The enamel is moderately rugose, and the 

 crowns of the upper cheek-teeth are worn into hollows ; there are 

 usually throe costae on the outer surfaces of the upper hinder pre- 

 molars. The lower cheek-teeth are characterized by the obliquity of 

 their plane of wear, the moderate rugosity of the enamel, and the 

 flattening of the outer surface of the first crescent. The limb-bones 

 are of a more slender type than those of R. antiquitatis. 



Hub. Europe. Pleistocene ; according to Boyd-Dawkins l it does 

 not occur in the Forest-bed of the Eastern coast of England. 



27836. The cranium, wanting the whole of the palato-m axillary 



{Fig.} region ; from the Pleistocene of Clacton, Essex. This 



specimen is Owen's type, and is described and figured by 



him in the ' British Fossil Mammals and Birds,' p. 356, 



fig. 131, p. 367, fig. 138, p. 368, fig. 139, and p. 369, 



fig. 140 ; it is also figured in ' Falconer's Palaeontological 



Memoirs,' vol. ii. pi. xv., under the name of R. Tiemitcechus. 



Presented by John Brown, Esq., 1852. 



45205. The cranium ; from the Pleistocene of Ilford, Essex. This 

 (fig-) specimen (fig. 13) is figured in the Geol. Mag. dec. 2, 



Fig. 13. 



Rhinoceros leptorhmus. Skull ; from the Pleistocene Brick-earth of the 

 Thames Valley at Ilford, Essex. About |. 



1 Quart. Journ. Geol. Soc. vol. xxxri. p. 396 (1880). 



