356 



SCOMBKID.E. 



Tliinl group : Cyttina. Scomhrkhe with two distinct divisions of 

 the dorsal fin, the spinous less developed than the soft. Body ele- 

 vated, covered \\\i\\ very small or rudimentary scales or with bony 

 protuberances. 



Bony plates along the base of the dorsal and anal fins ... 16. Zeus. 



Base of the fins not armed 17. Cyttus. 



Body with large, conical, bony protuberances 18. Okeosoma. 



Fourth group : Stromateina. Scomhridm with one long dorsal fin 

 without distinct spinous division. Toothed processes extend into the 

 oesophagus. 



Ventrals none in an ad alt state; body more or loss ele- 

 vated 19. Strom ATEUS. 



Ventrals well developed ; body more or less oblong 20. Centrolopiius. 



Fifth group : CoryphaBnina. Scombridce with one long doi-sal fin 

 without distinct spinous division. No teeth in the oesophagus. 



Ventrals thoracic, 1/5. Dorsal many -rayed, beginning on 



the occiput. Scales very small. Praeoperculum entire. 21. CoRYPn.ENA. 



Ventrals thoracic, l/o. Dorsal beginning on the back. 



Scales rather small. Praeoperculum entire 22. Brama. 



Ventrals subjugular, \jb. Scales large, provided with a 



hook ; praiopercuiar margin spmy 23. Taracte». 



Ventrals jugular, four-rayed. Dorsal beginning on the 



forehead. Scales of moderate size 24. Pteraclis. 



Ventrals thoracic or subjugidar, 1/5. Scales minute. 



PrtEopercular margin spiny 25. Schedopiiilu.s. 



Ventrals slender, subjugular. Dorsal beginning on the 

 neck, composed of unarticulated widely-set spines. 

 Scales minute, granular 26. Diana. 



Ventrals thoracic, rudimentary. Dorsal occupying the 



posterior lialf of the back . . 27. Ausonia. 



Ventrals thoracic, 1/5. Dorsal beginning on the back. 



Scales none 28. Mene. 



Ventrals many-rayed 29. Lampris. 



First Group. SCOMBRINA. 



Scomhridae with two dorsal fins, the spinous portion being .separate, 

 and much less developed than the soft. Body oblong, without or 

 with very small scales. 



1. SCOMBER*. 



Scomber, sp., Artcdi, Genera, p. .'50. 



Scomber, Cut. Rh/nc Anini. ; Cuv. ^- V(d. viii. p. 6. 



Body rather elongate ; cleft of the mouth wide. The first dorsal 



* 1. Scomber delphinalis, {Comment.) C. 4' ^- viii. p. 53. — Madagascar. 



2. japonici'.s, Huutt. Mem. Harl. xx. p. 331 ; C. cf V. viii. p. 54. —Japan. 



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