5oo Memoirs of the Indian Museum. [Vol. V, 



There are eleven specimens in the collection, among which one from Rambha is 

 fairly large, measuring 430 mm. in length. The species is found throughout the main 

 area of the lake and is a permanent resident, probably breeding near the mouths of 

 rivers before the rains. The following statement shows the different localities whence 

 the specimens were obtained, and their number and size. 



2 specimens . . Off Balugaon . . 21-VÜ-13 . . 130 mm. and 136 mm. 



4 ,, . . Barkul Bay . . 18-IX-14 . . 77 mm., 86 mm., 97 mm. 



and 115 mm. 

 1 specimen . . Off Barkul . . . . 121 mm. 



3 specimens . . 8 miles S. E. of Kalupara 



Ghat . . . . i6-ix-i4 . . 68 ,, to 69 mm. 



I specimen . . Rambha . . . . ig-xi-14 . . 430 ,, 



Distribution : — Seas of India ; China ; Indo-Australian Archipelago ; North- 

 Australia ; this species ascends higher up the rivers than any other of the family. 



Family SPHYRAENIM. 



Genus SPHYRAENA, Artedi. 



Sphyraena raghava, sp. nov. 



(Text-figures 20, 21.) 



The body is elongated and round but a little compressed and is also slightly con- 

 stricted near the end of the caudal peduncle. The dorsal profile is almost straight ; 

 the ventral profile is slightly convex to the anterior origin of the anal fin, posterior to 

 which it runs up, narrowing down the depth of the fish to the constricted portion of 

 the caudal peduncle. 



The measurements in hundredths of the length without the caudal fin are as fol- 

 lows : the length of the head 31 %, the height of the body 14-3 %, the length of the 

 snout 15*24 %, the horizontal diameter of the eye 5*24 %, the length of the maxillary 

 13 %, the breadth of the interorbital space 47 %, the length of the pectoral fin 10-95 % > 

 the length of the ventral fin 76%, and the least depth of the caudal peduncle 7-14 %. 



The distance between the occiput and the anterior origin of the first dorsal fin is 

 equal to the length of the snout ; the distance between the anterior origin of the first 

 dorsal fin and the anterior origin of the second dorsal fin is equal to the distance 

 between the anterior origin of the second dorsal fin and the commencement of the 

 caudal fin rays on the superior side of that fin ; the distance between the anterior 

 origin of the second dorsal fin and the root of the caudal fin about its middle is equal 

 to the length of the head. The depth of the body is contained seven times in the 

 length without the caudal fin. The least height of the caudal peduncle is half the 

 depth of the body and is contained two and two-thirds times in the length of the 

 caudal peduncle. 



The head is long and tapering and is as high as broad. The upper and the lower 

 profiles of the head are straight and the end is pointed. The length of the head mea- 

 sured from the tip of the mandible is contained three and one-fifth times in the length 

 without the caudal fin, and the height of the head, which is equal to the width of the 



