1904.] MOrSE-HARES OF THE GEXUS OCHOTOXA. 21T 



1875) ; id. J. A. S. B. xlvi. p. 326 (1877) ; id. Yark. Mamm. p. 74. 

 ■pi. vi. fig. 2, pi. vii a. fig. 2 (1879). 



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

 1875); id. Yark. Mamiii. p. 77, pi. ^^i. fig. 1, pi. vii «. fig. o 

 (1879). 



Superficially this species is not unlike a pale form of 0. rutila,. 

 but a glance at the skull shows it to belong to the cm'zonke 

 group, and its large ears will prevent confusion A\-ith any othei- 

 niembers of that group. 



This species is of modei'ate size, and the general colour above 

 is pale brownish grey, each hair being dark-coloui-ed at its base, 

 white in the centi'e, and pale buft' subtei-minally Avith a black t\\>^ 

 Apparently it moults only once a year, in August, but in summer 

 the hair is much abraded and the animal is then much whiter. 

 The under parts and feet are Avliite. Along the sides of the face, 

 across the shoulders, and from the nose over the occiput, the 

 general greyish coloiu- is tinged with rufous, this rufous being 

 more marked in summer ; the eye is siu-rounded by an ill-defined 

 greyish ring. Tlie inner sides of the ears and a patch behind aie 

 white, the outer sides having dark brown hairs Avith white tips. 



Tlie shvM belongs tj-jjicaUy to the curzonice group, the sides of 

 the combined palatal and incisive foramina sloping outwards in 

 a regular slant fi'om theii- anterior point. Another pecuHarity 

 about the skull is the pi'esence of two small oval foramina above 

 and in fi-ont of the orl^it at the anterior end of the frontal bones. 

 These foiumina, which measui-e about 3 mm. by 1"5 mm., are con- 

 stant and uniform in all specimens of this species that I have 

 examined, though they may also be found sporadically throughout 

 the genus. In other respects there is nothing of note to be 

 observed in the skulls. 



Dimensions (from skin). Head and bodv 200 mm. ; ear 27 ; 

 hind foot 32. 



Skull. Palatal length 17 mm. ; zygomatic breadth 23; length 

 of nasals 14; length of molar series 9. 



Habitat. Doha, Kuenluen Mts. ; Pamirs ; Ladak. 



The large ears, correlated with skull-characters, enable this 

 species to be easily recognised. 



There are two species, 0. aurita and 0. grisea, described by 

 Blanford, which may probably be assigned to this species. I 

 have not had the opportunity of comparing any specimens, but 

 from the description and figures there can be no doubt that, if 

 not identical, they are very closely allied to 0. riiacrotis. 



OCHOTOXA ROY LEI (Ogilby). 



Lagomys roylei Ogilby, Royle's Him. Bot. p. Lsix, pi. iv. (1839) 

 id. Geoflr. Voy. Jacquemont, Mamm. p. 62 (1841); Waterlu 

 Mamm. ii. p. 26 (1848); Adams. P. Z. >S. 1858, p. 520; Blyth 

 Oat. p. 133 (1863) ; Jerd. Mamm. p. 226 (1867) ; Blanf. J. A. S. B 

 xH. pt. 2. p. 35 (1872); Lydekker. J. A. S. B. xlvi. p. 286 (1877); 

 Scullv, Ann. Mag. ^s'at. Hist. ser. 5, vol. viii. p. 100 (1881) 



