344 ^' ^- IviyOYD : Aquatic animals from Tibet. [Voi,. II, 



distal half of the spine is flexible, in the other the spine is much 

 stouter, the serrations are longer and only the distal third is flexible. 



The anal fin contains three feeble spines and seven soft rays ; 

 when laid flat it does not quite reach to the caudal. 



LX. 105- -no, — Iv.tr. 25 — I — 25. The '' tiled row" contains 

 fifteen scales, each about | of the diameter of the eve. Phar3mgeal 

 teeth ten on either side, rows not regularly arranged. 



Colour. — '^Bluish above with steel-blue scales; sides yellow 

 orange ; belly white ; upper surface of head dirty olive ; cheeks 

 golden. " 



Oreinus baileyi, n. sp. (PI. xxv, figs. 2, 2a.) 



lycngth of head is to the length of the body (without caudal) 

 as 1 : 4. The head is scaleless, and conical in shape, the upper 

 profile slopes downwards, but the lower profile is almost in a line 

 with the ventral surface of the body. The diameter of the eye is 

 to the length of the head as i : 7. 



The eye is to the snout in length as 2 : 5. 



The dorsal fin contains three spines and seven rays ; the third 

 spine is stout and deeply serrated posteriorly; it is jointed and 

 flexible near the tip, and is as long as the postocular part of the head. 

 The first dorsal spine is much nearer the root of the tail than to the 

 snout. The distances which separate these points being in the pro- 

 portion of 3 : 4. The anal fin contains three feeble spines and six 

 rays ; when laid flat it does not quite touch the caudal. 



The pectoral, pelvic, and anal fins are all very nearly of the 

 same length and are equal to the length of the head excluding the 

 snout. 



The length of the caudal fin is equal to the greatest depth of 

 the body. 



Both upper and lower lips are very thick and fleshy, so that 

 they appear as though covered by a mask. 



The lower lip has a deep median notch which converts it into 

 a horse-shoe-shaped sucker. 



The maxillary barbel is as long as the lower lip, the rostral 

 barbel is somewhat shorter. 



Pharyngeal teeth 5.3.2 | 5.3.2. 



Lateral line contains about 100 scales. The ''tiled" row of 

 scales contains about 23. The diameter of the largest of them is 

 about f of the diameter of the eye. 



Colour. — ■'' Steel-blue, silvery, with a tinge of gold on the sides; 

 back of the head is dirty olive, a tinge of gold on operculum; dorsal 

 and caudal fin spotted with black ; also irregular black spots over 

 the body. " 



