274 Records of the Indian Museum. [Vol. XVI, 



barbels. The number of branchiostegal rays is twelve ; they are 

 concealed under soft thick skin. 



The pectoral and the pelvic fins are low, small and narrow, 

 covered with soft skin. The pectoral fins, which are situated 

 immediately behind the gill openings, are very low and are on 

 a level with the ventral surface. The small pelvic fins are on the 

 ventral surface and arise slightly anterior to and enclose the anal 

 opening which is placed on a slightly raised cushion, the fins 

 reaching beyond it. Immediately behind the cushion of the anal 

 opening there is a deep fossa inside which is the slender anal papilla so 

 common among the siluroids. At about the middle of the interval 

 on the ventral surface, between the roots of the pectoral and pelvic 

 fins, the loose skin appears to be folded into twelve or thirteen 

 corrugations which may be considered as a rudimentary structure 

 analogous to the adhesive disks found in some of the genera (e.g. 

 Pseudecheneis, Glyptosternon, Euglyptosterum, etc.) belonging to 

 this family. The pelvic fins reach beyond the fossa behind the 

 anal opening, but do not reach the anal fin which is high and long. 

 The caudal fin is flat and well spread out, but is sub-truncated. 

 Some very short and compact fin-rays continue round the caudal 

 peduncle to a slight extent along both the ventral and dorsal 

 edges. 



The colour in spirit is brownish-black above and lighter below. 

 The maxillary barbels are white-tipped and the nasal and the inner 

 mandibular barbels are dusky white. 



The measurements of the specimen in hundredths of total 

 length without the caudal fin are as follows : — 



Length of body in millimeters ... ... ... 8l 



Depth of body expressed in hundredths of length ... I4'8 

 Depth of caudal peduncle ,, ,, ,, ,, ... I3'5 

 Length of head ,, ,, ,, ,, ... i8"5 

 Depth of head at occiput ,, ,, ,, ,, ... lo 

 Width of head ,, „ ,, ,, ... i.yS 

 Width of interorbital space ,, ,, ,, ,, •••5 

 Length of snout ,, ,, ,, ,, ... 6 

 Distance from end of snout to dorsal fin ,, ,, ... 22 

 Distance from end of snout to root of pectoral fin ,, ... ij'3 

 Distance from end of snout to root of pelvic fin in hun- 

 dredths of length ... ... ... . . 44'5 



Distance from end of snout to anterior root of anal fin in 



hundredths of length ... ... ... ... 63 



Distance from last anal ray to root of caudal fin in hun- 

 dredths of length ... ... ... ... 22 



Height of longest dorsal ray in hundredths of length ... 11 



Height of longest anal ray ,, ,, ,, ,, ... 11 



Length of caudal fin ,, ,, ., ,, ... I4'8 



Length of pectoral fin ,, ,, ,, ,, .. I2'3 



Length of pelvic fin ,, ,, ,, ,, ... 7*4 



Length of adipose fin ,, ,, ,, ,, ... 3i'2 



Depth of adipose fin ,, ,, ,, -. 4 



Base of anal fin ,, ,, ,, ,, ... i^"5 



Number of rays in dorsal fin ... ... ... 15 



Number of rays in anal fin ... ... ... 13 . 



Number of rays in pectoral fin ... ... ... 17 



Number of rays in pelvic fin ... ... ... 7 



Number of long rays in caudal fin ... ... ... 20 



