REPORT ON FISHES. TART I : COBITIDAE " 315 



margin of the ojjerculuni ; tliey are dorsolateral in position and invisible from the ventral sur- 

 face. The diameter of the eye is contained from 4.1-4.9 times in tlie lens^th of the head, from 

 1.5-1.7 times in the length of the snout and from 1-1.5 times in the interorbital width. The 

 month is lunate and transverse; it is on the ventral surface not very far behind the tip of the 

 snout and is bortlered by ileshy lips which are continuous at the angles of the mouth. The 

 ventral lip is divided in the middle almost imperceptibly. The lips are folded, fimbriated and 

 covered with minute papillae. The lower jaw is sharp and liorizontal, while the upper jaw 

 is vertical and lies in front of the lower. The barbels are thin and long; the inner rostrals 

 arc almost as long as the diameter of the eye, while the other two pairs are much longer. 

 The only mature female specimen is heavily parasitised and, in conserjuence, the depth 

 of its body is relatively greater. In the male specimens the depth of the body is contained 

 from 7.7-8 tiiues in the total length and from 6.2-0.6 times in the length without the caudal. 

 The lateral line is well developed above the base of the pectoral fin beyond which it is incon- 



Figure 6. Lateral view (if a female .specimen (jf Nemachilus hutchinsoni, sp. iiov. Nat. .size. 



spicuous. The caudal peduncle is long but fleshy; its least height is contained from 4.4-5.1 

 times in its length. The least height is either greater than or etpial to the diameter of the 

 eye; in the female specimen the least height is considerably greater than the diameter of 

 the eye. 



The dorsal liu is inserted in advance of the ventrals and its coiumencement is consid- 

 erably nearer tn the ti[) of the snout than to the base of the caudal fin; it is somewhat longer 

 than the head but this character is more marked in the female specimen. The posterior 

 margin of the fin is almost truncate. The paired fins are horizontally placed and are broadly 

 jiointed in the middle. The pectoral is shorter than the head and is separated from the 

 ventral by a considerable distance. The ventral extends beyond the anal opening and almost 

 reaches the anal fin which extends half way to the base of the caudal fin. The caudal fin 

 is somewhat longer than the head ; it is slightly emarginate with the two lobes broadly 

 rounded. The upper lobe is better developed and longer than the lower. 



Nemachilus hutchinsoni exhibits sexual dimorphism and the secondary sexual charac- 

 ters of the male are similar to those of the other species discussed here. The mature male 

 and female specimens are from two different localities so one cannot be certain that they 

 beldug to the same species. A male specimen has been selected as the type of the species. 

 .\ttention luay 1^ directed to the fact that in the female specimen the caudal peduncle is 

 relatively deeper and the dorsal fin longer than is the case in the males. 



Air-bladder. The air-bladder is of the usual Diplophysid tyjie. The anterior ])art is 

 dumbbell-shaped and is enclosed in two bony capsules \\hile the posterior part, which is deeply 



