On new Species of lli.steiidaj. 301 



Caiulal forked. Caudal peduncle about 2^ as long a? deep. 

 Gieyisli above, silvery below. Head, body, and fi:i3 (the 

 ventrals sometimes excepted) covered with dark spots of small 

 or moderate size. 



Four specimens, 300-400 mm. in total length, from tha 

 Yaindok Lake, a large lake without outlet at an altitude of 

 14,800 feet. They were obtained by Lieut.-Col. L. A. 

 WaddelljC.B., who preserved them iu salt and has presented 

 them to the British Museum. 



Nemachilus Ihasce. 



Depth of body 7;^ in the length, length of head 4|. Snout 

 a little longer than postorbital part of head, twice as long as 

 eye, the diameter of which is 4| in the length of head and 

 equal to the interorbital width. Breadth of head If in its 

 length and very slightly greater than its depth. Cleft of 

 mouth extending to below the nostrils ; lips moderately thick, 

 plicated, the lower interrupted medianly ; barbels six ; outer 

 rostral barbel nearly reaching the middle of the maxillary 

 barbel, which is 1| the diameter of eye. Scales entirely 

 wanting. Dorsal II 9, its origin nearly equidistant from 

 tip of snout and base of caudal ; free edge of the tin concave. 

 Anal II 5. Pectoral extending f of the distance from its 

 base to the base of ventrals. Ventrals 9-rayed, extending to 

 the origin of anal. Caudal emarginate. Caudal peduncle 

 slender, 6^ as long as deep and 11 the length of head. 

 Olivaceous, with traces of darker cioss-bars on the back ; 

 dorsal and caudal fins with small dark spots. 



A single specimen, 84 mm. in total length, from Lhasa, 

 collected by Capt. H. J. Walton. 



Allied to xV. stenurus^ Herz. 



When writing my descriptions of the Cypidnid fishes 

 collected by Capt. Walton {supra, p. 185) I overlooked this 

 specimen. 



XXXV. — On new Species o/ Histerid^ and Notices of others. 

 By G. Lewis, F.L.S. 



This paper is written to found a new genus and to describe 

 three new species, the names of which are given in the 

 'Catalogue of llisteridae' which will shortly be published. 

 It is the twenty-fourth of the series in this Magazine; the 

 previous paper is in vol. xiv. p. 137 (1904). 



