igiô.] 



Fauna of the Chilka Lake : Fish. 



423 



Engraulis rambhae, sp. nov. 

 (Text- figure 5.) 



The dorsal profile is highly convex and the ventral profile is almost straight. 

 The body is compressed. The anterior abdominal edge is provided with twenty-two 

 scutes beginning from the throat, seven of which are post-ventral. 



The height of the body is 26 % of the total length, the length of the head 24 %, 

 the least depth of the caudal peduncle 8%, the length of the maxillary 23%, the 

 length of the pectoral fin 18 % , the length of the ventral fin 9 % , the length of the 

 base of the anal fin 39 %, the diameter of the eye 6 % and the length of the snout 4 % 

 in the total length without the caudal fin. 



The snout is prominent, the maxillary is dilated above the mandibulary joint and 



Fig. 5. — Engraulis rambhae, Chaudhuri, x i|. 



its posterior tapering portion extends slightly beyond the gill opening, but does not 

 reach the root of the pectoral fin. 



The dorsal fin has one spine and ten rays with an isolated spine just in front, the 

 origin of the fin is nearer to the snout than to the base of the caudal fin. 



The pectoral fin has thirteen rays and reaches much beyond the root of the. 

 ventral fin, covering nearly three-fourths of that fin. The appendage is small and thin. 



The ventral fins have seven rays each, the tips of which are at three scales in 

 front of the anal opening. The appendages at their axil are thin and small. 



The anal fin has forty rays, the number of scales in the lateral line is forty-six 

 and in the line of the greatest breadth twelve. 



Colour. — The dorsal edge is black ; the body is silvery with the upper portion 

 yellowish-brown, the lower half of the posterior part is brown and the fins are hyaline. 



The highly convex dorsal profile at once distinguishes this species from the rest of 

 the species in the genus most of which have a more or less straight dorsal profile. 



