742 Records of the Indian Museum. [Vol. XXII, 



3. The dorsal spine is almost smooth The dorsal spine is finely serrated 

 alonCT both the borders. j along the whole of its anterior border 



I and also along the upper one-third 

 [ of the posterior border. 



4. The skin covering the bell)' is ! The skin covering the belly is cor- 

 smooth. rugated to form a kind of rudimen- 

 tary adhesive apparatus. 



Besides these points the two species differ in proportions and 

 colouration. Moreover the eggs of L. shawi are minute whereas 

 those of L. ribeiroi are much larger. 



L. ribeiroi is a small subcylindrical fish with the head and 

 body slightly depressed. The dorsal profile rises gradually from 

 the tip of the snout to the base of the dorsal fin^ beyond which it 

 falls to the root of the caudal fin. The ventral profile is some- 

 what arched. The head is short and broad ; its length is contained 

 about 37 times in the length of the fish without the caudal fin. 

 The eyes are minute and are situated almost in the middle of 

 the head on the dorsal surface ; they are irot visible from below. 

 The mouth is situated on the under surface slighth' behind the 

 tip of the snout and is bordered by moderately thick lips. The 

 nostrils are situated close together ; they are nearer to the tip of 

 the snout than to the anterior margin of the eye. The gill- 

 openings are very wide. There are 8 barbels ; the maxillary 

 barbels are provided with broad bases and do not reach the base 

 of the pectoral fins. The skin covering the belly is thrown into 

 oblique grooves and ridges which form a V-shaped adhesive ap- 

 paratus similar to that found in the genus Glyptothorax but not so 

 well-developed. The dorsal fin commences somewhat in advance 

 of the ventrals and its origin is much nearer to the tip of the 

 snout than to the root of the caudal fin ; it is provided with a 

 strong spine and six rays. The dorsal spine is not so high as the 

 depth of the body below it ; it is serrated along the whole of its 

 anterior border and along the upper part of its posterior border. 

 The pectoral is slightly shorter than the head and is separated 

 from the ventrals by a short distance. The pectoral spine is flat 

 and strong ; externally it is serrated but internally it is provided 

 with eight curved spines. The ventrals just extend beyond the 

 anus but do not reach the base of the anal fin which contains 10 

 rays. The caudal fin is long and its free posterior border is semi- 

 circular ; the two extremities are sharply pointed, the lower is 

 slightly longer than the uppej. 



The scapular process is small and there are a number of bony 

 tubercles behind the gill-opening in a horizontal line. The bones 

 of the head and the various processes are slightly corrugated but 

 not distinctly tuberculate. 



Colour. — The sides and the dorsal surface of the head and 

 body are dark ; the ventral surface is dull white, speckled with 

 black dots. There are two broad yellowish bands on the body; 

 the anterior is between the rayed dorsal and the adipose dorsal 

 fins and the second is below the posterior half of the base of the 



