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



and the}' reach as far as the vent ; the ends of these rays are 

 soft, thin, slender and almost silky. The anal fin has two spines 

 and nine rays and there are seven scales betwen the last anal ray 

 and the root of the caudal &n ; the height of the anal fin is con- 

 tained seven times in the total length. The caudal fin is deeph^ 

 lobed and contains twenty long rays ; the length of the longest 

 rays of the borders is contained three times and that of the short 

 middle rays seven times in the total length ; the lobes of the caudal 

 fin are equal. 



The scales are fairly large and are nondeciduous. There are 

 thirty-three perforated scales in the lateral line, which is complete 

 and runs concave to the dorsal profile from the gill opening to 

 below the end of the dorsal fin and thence straight about the 

 middle of the fish to the root of the caudal fin. Below the ante- 

 rior root of the dorsal fin there are seven transverse rows of scales 

 above the lateral line and five transverse rows between the lateral 

 line and the mid-ventral line. There are four rows of scales 

 between the lateral line and the pelvic fin. The number of scales 

 round the narrowest part of the caudal peduncle is eleven. 



Measurements in hundredths of total length without caudal fin : — 



Depth of body ... ... ... ... 36-5 



Depth of caudal peduncle .. ... ... I4"3 



Length of head ... ... ... ... 26-8 



Depth of head ... ... ... ... 24-6 



Width of head ... ... ... ... 17 



Length of snout ... ... ... ... 7"3 



Diameter of orbit ... ... ... ... 97 



Width of interorbital space ... ... .. i"2"2 



Width of mouth ... ... ... ... 12-2 



Length of maxillary ... ... ... ... 7 '3 



Length of barbel ... ... ... ... 7 "3 



Distance from tip of snout to anterior root of dorsal fin ... 48"78 



Height of longest dorsal rays ... ... ..24*6 



Distance from tip of snout to root of pectoral fin - ... 29'27 



Length of pectoral fin ... ... ... 24*6 



Distance from tip of snout to root of pehic fin ... 5f2 



Length of pelvic fin ... ... ... ... . I9"5 



Distance from tip of snout to vent ... .. 68'3 



Distance from tip of snout to anterior root of anal fin ... 73*2 



Height of longest anal rays ... ... ... 17 



Length of caudal peduncle ... ... ... 17 



Width of root of caudal fin .. ... ... 18 



Length of longest rays of caudal fin ... ... 34" i 



Length of shortest middle rays of divided caudal fin ... 14*6 



Total length without caudal fin in mm. ... ... 41 



The colour of the body of the fish in spirit is steel blue, but 

 lighter in the belly. The upper edge of the orbit is black and the 

 dorsal edge and the upper side of the head are dark ; the fins are 

 dull w^hite with dark edges. 



There are only two other species belonging to the genus : 

 S. semiplotus (M'Clelland) from Assam and Burma and S. niodestus, 

 Day, from the hill ranges near Akyab. The new species differs 

 considerably from both of them in possessing barbels, and in not 

 being provided with a knob at the symphysis of the lower jaw — 

 two characters which originally were thought to be of generic im- 



