CABANGED.S. 173 



the anal. Scales cycloid. Lateral line a little raised on the 

 side of the tail. Colour bluish, with five or six dark vertical 

 bands ; caudal sometimes with the ends of the lobes white, and 



Fig. 59. Naucrates ductor. 



having a dark band across their last third. Basal half of anal and 

 centre of dorsal dark grey. 



Hab. Seas of temperate and tropical regions. 



6. Genus CHOKINEMUS, Cuv. & Val. 

 Syn. Scomberoides, Lace"p. 



Brauchiostegals seven or eight ; pseudobranchise. Body oblong 

 and compressed. Eyes lateral. Cleft of mouth moderate or deep. 

 Teeth in jaws, also present on vomer, palatines, and tongue. Two 

 dorsal fins, the first (preceded by an immovable, recumbent spine, 

 directed forwards) has a groove at its base for its reception; it is 

 formed by a few free spines, fewer in number than the rays of 

 the second dorsal or anal, the posterior rays of both of which are 

 either detached or semi-detached; a pair' of preanal spines sepa- 

 rated by an interspace from the remainder of the fin. Dermal 

 scales mostly lanceolate. Lateral line continuous, not keeled. 

 Air-bladder bifurcated posteriorly. Pyloric appendages numerous. 



Geographical Distribution. Indian Ocean and tropical parts of 

 the Atlantic. 



Synopsis of Indian Species. 



A. Dor?al spines flattened, the end of each does 

 not reach base of next in adults ; height of 



body 4| to 4f in total length 1. C. sancti-petri, p. 174. 



B. Each dorsal spine overlaps the next. 



Height of body 5 in total length 2. C. moadetta, p. 174. 



Height 3 to 4 in length. No canines . . 3. C. lysan, p. 175. 

 Height 3 in length. Distinct canines in 



both jaws 4. C. tala, p. 176. 



Height 3^ to 3 in length. No canines in 



tipper jaw 6. C. toloo, p. 1 76. 



