OCR Text |
Show 1876.] 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 interspace 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 between 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. Tenasserim. 4. E. davidi *. The interspace between the first and adipose dorsal fins eqjuals the length of the latter. Pectoral reaches the ventral. Eastern Tibet. 5. E. stoliczka. 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 O. sinuatus, Heckel, from Leh or Ladak, and which has likewise been captured in Cashmere. 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. |