On a minute Shrew from Lake Baikal, 499 



8. Nyctophilus walkeri, Thos. 

 Ann. & Mag. N. H. (6) ix. p. 405 (1892). 



Size conspicuously smaller and ears shorter than in any 

 other species. Nose-leaf o£ medium development (No. 2). 

 Baculum not known. 



Skull far smaller than in other species, bullae hardly larger 

 than in ordinary short-eared Vespertilionine bats. 



Forearm 33*5 mm. 



Skull : greatest length 13 ; condylo-basal length 12"2 ; 

 bulla 2*8; maxillary tooth-row 4"7. 



Hah. Northern Territory (Adelaide River). 



Tijpe. Adult female. B.M. no. 92. 4. 4. 1. 



No further specimens of this most distinct little species 

 have as yet been recorded. By its small size, proportionally 

 small ears, and the correspondingly reduced bullae, it may be 

 said to be more different from all the otiier species than any 

 of them are from each other. But there is nothing to indicate 

 any superspecific distinction. 



XLII. — On a minute Shreio from Lake Baikal. 

 By Oldfielu Thomas. 



(Published by permission of the Trustees of the British Museum.) 



During his recent expedition to Lake Baikal, unfortunately 

 interrupted by the outbreak of war, Mr. G. A. Burney 

 obtained a single specimen of an excessively small shrew, 

 smaller than any Sorex known, and rivalling in minuteness 

 the pygmy Pachyurce of the hodgsoni group. It would 

 appear to be allied to the Japanese Sorex hawkeri and the 

 more recently described 8. ischersMi, Ognev *, from the 

 Ussuri. I would propose to call it 



Sorex hurneyi, sp. n. 



Size excessively minute, less than in any known species 

 of the genus. Fur o£ back only about 2*3 mm. in length 

 (summer). General colour much as in S. hawkeri, light 

 brown, near sepia, above, sides and under surface dull drabby 

 whitish, not contrasted with colour of upper parts, and very 

 far from white. Hands and feet dull brownish white. Tail 



* Ann. Mus. St. Petersb. xviii. p. 412 (1913). 



