1875.] Western Tibet and Eastern Turkestan. 109 



excedentibus, supremis nigris, cceteris albis ; vellere longiusculo. molli, nitido, 

 basin versus ad tergum schistaceo ; palmis subnudis, fills sparsis indutis, 

 plantis confertissime pilosis ; dente molario ultimo simplici, incisoribus imi- 

 sulcatis. Long, exempli majoris nuper occisi a rostro ad basin caudce 5'5, 

 eaudce 625, anris G"75, pedis posterioris a calcaneo 1*4 poll. Long, exempli 

 oninoris 4*5, caudce 5 poll. 



Sab. — Plains of Eastern Turkestan. 



This form is distinguished from all others with which I am acquainted 

 by the peculiar flap at the end of the snout covering the nasal apertures. 

 This flap is semicircular in form, and hairy inside. I can find no descrip- 

 tion of a similar appendage in any other species, and there is nothing of the 

 kind in G. Indicus, G. Surriance, or in two undescribed species from Persia 

 and Baluchistan, of all of which I have examined specimens preserved in 

 spirits. 



G. cryptorliinus is coloured like G. oneridianus, but is of the same size 

 as G. tamaricinus. From both the above species and from their ally, G. 

 collium* which inhabits western Turkestan, the present species is distin- 

 guished by the tail being longer than the body. 



Another peculiarity of G. cryptorliinus is that the lachrymal bone 

 appears never to be ankylosed to the skull. Consequently the process of 

 the lachrymal which in all true Gerbilli projects into the anterior angle of 

 the bony orbit, is frequently absent from the whole bone being lost. This 

 was the case in two skulls which I examined. 



25. Dipus LAGOPUS. — Plains of Eastern Turkestan. 



26. Lepus pallipes ? — Ladak. 



27. L. Tlbetantjs ? — Nubra valley, Ladak. 



28. L. Yaekandensis. 



Giinther, Ann. and Mag. Nat. Hist., September, 1875, 4, XVI, p. 229. 

 L. parvus, afflnis Lepori tolai, sed multo minor, nusqiiam niger nee 

 griseus, auribus usque ad apicem concoloribus, liaud nigris, arenaceo-isabel- 

 linus,fusco plusve minusve ad dorsum lavatus, lateribus lacteis, pectore palli- 

 dissime rufo, caudd alba, superne fused ; vellere molli, longiusculo, ad basin 

 cinereo. Long, a rostro ad basin caudce 17, capitis 3*6, caudce 4, auris 4*25, 

 tarsi 4 - 25 poll. 



* For translations of the characters of this and of some other species described in 

 Russian by Severtzoff in his Turkestanskie Jevotnie, I am indebted to the kindness of 

 Dr. Feistmantel. No translations are given in the "Zoological Record," and in the 

 " Archiv fur Naturgeschichte" even the names are omitted. It is greatly to be regretted 

 that M. Severtzoff docs not, like all the best naturalists amongst his countrymen, 

 describe in a language more generally understood. 



