RHrNOCEROTIDJE. 119 



23133. Another very similar specimen, belonging to the right side, 

 and showing the last three milk-molars, and the alveoli 

 of mm. 1 and mm. 4 ; from the Pleistocene of Grays. 



Purchased, 1849. 



23112. Part of the right ramus of the mandible of a young indi- 

 vidual provisionally referred to this species; from the 

 Pleistocene of Grays. The last two milk-molars are in 

 situ, and beneath and behind them are seen the alveoli of 

 pm. 3, pm. 4, and mTT. Purchased, 1849. 



21281. Part of the right ramus of the mandible of a very young 

 individual, showing mm. 2 and the alveoli of mm . 1 and 

 mm. 3 ; from the Pleistocene of Grays. Purchased, 1847. 



18799. The second right lower true molar ; from the Pleistocene of 

 Grays. Purchased, 1845. 



M. 1586. Two left lower molars ; from the Pleistocene of Weimar. 

 Presented by C. Westendarp, Esq., 1884. 



36994. Cast of the fourth right lower premolar. The original is 

 from the Pleistocene of Kirchberg, and belongs to Jager's 

 B. kirchbergensis. Presented by C. Falconer, Esq., 1867. 



18755 C. The second left lower premolar ; from the Pleistocene of 



(Fig.) Grays. Figured by Boyd-Dawkins in the Nat. Hist. Rev. 



for 1865, fig. 4. Purchased, 1845. 



27902. The first left lower milk-molar ; from the Pleistocene of 

 (Fig.) Grays. Figured by Boyd-Dawkins, op. cit. fig. 6. 



Purchased, 1849. 



A number of detached lower cheek-teeth from the Pleistocene of the 

 Thames Valley, marked Nos. 18755, 18799, 19834, 19841, 

 20249, 21283, 22023, belong either to this or the preceding 

 species. 



Rhinoceros etruscus, Falconer '. 

 Syn. Rhinoceros elatus, Croizet (? MS.). 



The ossification of the narial septum is incomplete. The upper 

 cheek-teeth have shorter crowns than those of either of the three pre- 

 ceding European species, and a very stout cingulum on their anterior 

 surfaces ; their grinding surfaces are deeply excavated, and when worn 



1 Quart. Journ. Gteol. Soc. vol. XT. p. 602 (1859). 



