1S76*.] MR. F. DAY ON THE FISHES OF YARKAND. 783 



snout than the posterior end of the adipose dorsal, and commences 

 midway between the bases of the ventral and caudal fins ; it is half 

 higher than long. Caudal cut almost square. Free portion of the 

 tail half higher than long. Skin tuberculated from the head, along 

 the lower surface of the body, to nearly as far as the base of the 

 ventrals. Colours : of a dull yellowish green, becoming lightest 

 along the abdomen. Fins yellowish, with dark edges or bands. 



Hab. Basgo, Sneema, and Leh or Ladak on the head-waters of 

 the Indus. The longest specimen 7 inches in length. 



I propose here to shortly remark upon the distinction between the 

 six species of Exostoma at present known. 



A. Teeth in jaws pointed. 



1. Exostoma labiatum. Lower labial fold uninterrupted. The in- 



terspace between the first and adipose dorsal fins equals two 

 thirds the length of the latter. Anal commences much nearer 

 the base of the caudal than the base of the ventral. Mishmee 

 Mountains, East Assam. 



2. E. blythii. Lower labial fold uninterrupted. Interspace be- 



tween dorsal fins very slight. Anal commences in last third of 

 distance between ventral and base of caudal. Head-waters or 

 affluents of Ganges. 



3. E. berdmorei. Snout more pointed. Caudal forked. Tenas- 



serim. 



4. E. davidi *. The interspace between the first and adipose dorsal 



fins eq.uals the length of the latter. Pectoral reaches the ven- 

 tral. Eastern Tibet. 



5. E. stoliczkce. Lower labial fold interrupted. Anal commences 



nearer the base of the ventral than that of the caudal. Pectoral 

 does not extend to the ventral. Upper waters of Indus. 



B. Outer row of teeth flattened. 



6. E. andersonii. Lower labial fold interrupted. Bhamo. 



Family Cyprinid.e. 



The majority of the fishes in the collection consist of Carps, those 

 from the more elevated regions being confined to such as have the 

 vent and base of the anal fin bounded by a row of tiled scales, and of 

 the ubiquitous Loaches. 



Genus Oreinus, M'Clelland. 



Only one species exists in this collection, the 0. sinuatus, Heckel, 

 from Leh or Ladak, and which has likewise been captured in Cash- 

 mere. 



Although some of the specimens were obtained in Cashmere, where 

 the genus Oreinus has representatives, there was no example of one 

 of these fishes from that locality in this collection. 



Having observed upon the great variation in proportions existing 

 in a species of Exostoma captured on the Hills, it may be worth 

 * Equals Chimarrichthys davidi, Sauvage. 



