216 MR. J. LEWIS BONHOTE ON THE [Nov. 15,. 



The shidl, except in size, does not differ from that of 0. cur- 

 zonice. 



Dimensions (after Biichner). iHead and body 235 mm. ; hind 

 foot 34; ear 21. 



Skull. Greatest length 41 mm, ; basal length 36 ; palatal length 

 16; zygomatic breadth 21-5; leng-th of nasals 13 ; length of molar 

 series 9 ; interorbital breadth 4. 



Habitat. Kuku-noor and Gannsu, IST. Thibet. 



OCHOTONA DAURICA (Pall.), 



Lepus dauricus Pall. Reise, iii. 1776, p. 692. 



Lagomys dauricus (Pall.), Biichn. Mamm, Przewalski, i, p. 172,. 

 pi, xxii, fig, 1 & pi, xxY, figs, 1-5 (1890). 



The general colour of this species is a very pale buff, lighter 

 on the flanks and rather yellower along the centre of the back 

 and over the forehead. Each hair is dark slate-grey at the base, 

 succeeded by a whitish portion, increasing in colour towards the 

 tip, which is sometimes dark brown. Ears well covered with 

 whitish hairs ; feet white, Undei- parts pure white, having- 

 occasionally a yellowish collar round the neck. 



The skulls at my disposal are too fragmentary for a detailed 

 description. Buchnei-, however, gives a good figure, from which 

 it appears to differ but little from the nearly allied species. Its. 

 most marked features are the bullee, which are large, prominent, 

 and rounded. 



Dimensions (after Biichner). Head and body 220 mm. ; hind 

 foot 14-5 ; ear 19. 



Skidl. Palatal length 18 mm. ; length of nasals 14-5 ; length 

 of molar series 8"5. 



Habitat. Originally described from Dauria. 



Much confusion seems to exist over this species, Avhich closel}- 

 resembles at least three others, viz. 0. curzonice, melanostoma, and 

 ogotona. 



The black muzzle of 0. melanostoma serves at once as a distin- 

 guishing character, while from 0. cm-zonim the paler colour of the 

 present species as well as the longer and softer coat form charactei-s 

 hy which it may always be distinguished. 



From 0. ogotona, to which it bears a greater external resem- 

 blance, and with which it has been confounded by Biichner, it 

 may be distinguished by its miich smaller size, while the skull- 

 characters are very distinct. 



OCHOTONA MACROTIS (GUnth.). 



Lagomys macrotis Giinth, Ann. Mag, ISTat. Hist, ser, 4, xvi, p, 231 

 (Sept, 1875); Blanford, Yark, Mamm. p. 75 (1879); Scully, Ann. 

 Mag, N'at. Hist. ser. 5, vol. viii, p. 100 (1891); id. P. Z. S. 1881, 

 p. 207; "W,L, ScL Cat, Mamm, Ind. Mus, p, 110 (1891); Blan- 

 ford, Faun. Br, India, Mamm, p, 457 (1891). 



Lagomys auritus Blanford, J, A, S. B, vol. xliv. p. Ill (Oct 



