SCOMBRID.E. — LV. 105 



c. Finlets present (5 to 10 in number) behind D. and A. ; dorsal spines less 

 than 25. (Scombrince.) 

 b. Caudal peduncle with median keel, a small keel above and below this. 

 c. Bod} T wholly covered with small scales, those on the "corselet " and 

 lateral line sometimes larger; vertebra; normal. 

 d. Teeth of jaws strong, subtriangular, more or less compressed : teeth 

 on vomer and palatines villiform; gill rakers few; corselet ob- 

 scure; dorsal spines 14 to 18; body compressed; head short; 



vertebrae 45 Scomberomorus, 125. 



dd. Teeth of jaws subconic, scarcely compressed ; gill rakers numerous; 

 corselet distinct. 

 c. Vomer toothless; palatines with one row of strong conical teeth; 



bod}- elongate; vertebrae about 52 Sakda, 126. 



ee. Vomer and palatines with sand-like teeth; body robust; vertebra? 



40 Albacoua, 127. 



cc. Body scaleless, excepting on corselet and about lateral line; abdo- 

 minal vertebras with enlarged foramina and a trellis-like structure 

 between the vertebra proper and the haemapophyses; vertebrae 

 about 38. 



f. Dorsals close together, the interspace about 5 in head ; palatine 



teeth villiform; no teeth on vomer. . . Gymnosarda, 128. 



ff. Dorsals well separated, the interspace more than half head ; 



teeth small, on vomer and not on palatines; gill rakers 



numerous Acxis, 129. 



bh. Caudal peduncle without median keel (the two lesser keels present as 

 usual); dorsals well separated, the interspace more than half head; 

 spinous dorsal short ; body scaly; corselet obsolete; vertebrae normal, 

 about 31, in number; teeth slender, on jaws, vomer and palatines; 

 gill rakers long, numerous Scomber, 130. 



125. SCOMBEROMORUS Lacepede. (o-/co>£por, Scomber ; 



o/xopos, near.) 

 a. Gill rakers short, thick, less than X + 8 ; dorsal spines 14 or 15. 



263. S. cavalla (Cuvier). Kixofish. Lateral line abruptly 

 bent below soft D. Iron grav, nearly plain ; spinous D. not black. 

 Head 5 ; deptb 6. D. XV -15 -VIII. A. II- 15- VIII. L. 6. 

 W. Indies, rarely N., a fine food-fish. (Spanish, horse.) 



aa. Gill rakers rather long and slender, more than X + 8; dorsal spines 17 

 or 18; lateral line wavy, not abruptly bent; teeth strong; spinous dor- 

 sal largely black. 

 b. Side with one or two narrow blackish stripes breaking up posteriorly 

 into irregular spots; similar spots usually present below these. 



264. S. regalis (Bloch). Sierra. Pintado. Teeth 40 in 

 each jaw; snout bluntish. Head 4\; depth 4^. D. XVIII -16- 

 Vin. A. II - 14 -VIII. L. 2\ feet. W. Indies, rarely N. 



bb. Sides with numerous round bronze spots, but never with dark longitu- 

 dinal stripe. 



265. S. maculatus (Mitchill). Spanish Mackerel. Bluish 

 above, sides silvery ; teeth about 30 in each jaw ; snout pointed. 



