igii.] B. L. Chaudhuri : The fauna of Yunnan. 19 



Barbels. — 6 in all^ 4 rostral and 2 maxillary. The maxillary 

 barbels are the longest, being half as long as the head and twice 

 as long as the inner rostral. The outer rostrals are just inter- 

 mediate in length between the maxillary and inner rostral. 



Lips. — Upper fleshy and thick. The lower lobulated, being 

 broken up into several fleshy protuberances in two series. The 

 opening of the mouth, which is inferior, is deeply crescentic ; the 

 corners are fleshy and thick. 



Fins. — The anterior root of the dorsal is slightly in advance 

 of the vertical from the anterior root of the ventral. It is also 

 equidistant from the posterior edge of the orbit and the root 

 of the caudal. A few of the last rays being slightl}^ longer than 

 those immediately in front the outer contour of the fin, which is 

 otherwise deeply convex, looks pointed at the end preceded by a 

 notch. The pectoral extending i of the distance from its base to 

 origin of ventral. The free end of the ventral is triangular and 

 the fin is two-thirds of the distance between the origin of ventral 

 and the anterior root of anal. The free end of the anal is rather 

 truncated and the depth of the caudal peduncle is contained li 

 times in the distance between the posterior root of the anal and the 

 root of the caudal fin. The outer margin of the caudal is con- 

 cave, the middle rays being 1 of the outermost rays. 



Scales. — Minute and not imbricate. Thorax and abdomen 

 covered with scales. 



Lateral line. — Incomplete, the perforated scales with lateral 

 organs are noticed only in 25 scales in the anterior part of the 

 body and the lateral line stops 12 or 13 rows of scales in front of 

 the vertical from the anterior root of the dorsal fin. 



Colour. — Head, body and fins dirty brown with marbled 

 markings in black all over the body. These marbled markings 

 appear to be irregular transverse bands arranged in a vertical 

 series from behind the operculum and running to the root of 

 caudal. Most of the bands are broken up in the middle except a 

 few over and behind the pectoral fin. The anterior bands are 

 generally shorter and thinner than those behind, lire margin of 

 the caudal fin is slightly darker. 



In colour as well as in shape this species has some superficial 

 resembtance to a young trout. 



Hah. — Mongpan, Southern Yunnan. 



A single specimen 56 mm. in length (including caudal fin). 



The new species resembles in some characters two other 

 Nemachili reported from Yunnan but from each of these it 

 differs in a good many important particulars some of which are 

 stated below:— Depth of body of N. pleurotaenia , Regan, is 5 and 

 of N. nigromaculatus , Regan, 4— 4J, whereas in the new species it is 

 only 3i; in A^. pleurotaenia the snout is as long as the postorbital 

 part of the head, in the new species the length of the snout is 

 contained if times in the postorbital part of the head. In N. 

 pleurotaenia the interorbital distance is i diameter of the eye, 

 in the new species it is i| diameters. The length of the maxillary 



