CARANGIDiE. — LVI. 107 



ba«k with about 35 dark wavy stripes. Head 3 ; depth 3^. D. 

 XI-12-V. A. 12-V. L. 2 feet. Atlantic, everywhere abundant, 

 one of the best known of food fishes. 

 66. Air bladder small ; top of head with a translucent area. {Pneuma- 

 tophorus Jordan & Gilbert.) 



272. S. colias Gmelin. Chub-Maokekel. Thimble Eye. 

 Dark blue ; sides soiled silvery, in the adult showing dusky cloud- 

 ings ; back with about 30 dark wavy streaks, extending to just below 

 the lateral line ; eye large. Head 3 ; depth 3^. D. IX or X - 1 2 - V. 

 A. 12-V. L. 12. Warm seas, not rare N., a food fish of much 

 less value than the mackerel. (£u.) (icoXms, old name of some 

 mackerel.) 



Family LVI. CARANGID^. (The Pompanos.) 



Fishes closely allied to the Mackerels, but with the vertebrae in 

 moderate number, about 25. Anal fin always preceded by two 

 spines, which sometimes disappear with old age; finlets usually 

 few or none. Teeth all small. Coloration usually metallic silvery. 

 Genera, 25 ; species 180 ; in all warm seas; most of them excellent 

 as food. 



u. Premaxillaries not proctractile (except in the very young); soft dorsal 

 similar to anal, both very long. {Scombroidina.) 

 b. Maxillary without supplemental bone; no pterygoid teeth: scales linear, 



imbedded Ol.igoplit£s, 131. 



ta. Premaxillaries protractile. 



(- . Pectoral fins long, falcate ; anal similar to soft dorsal, its base longer 

 than abdomen; maxillary with supplemental bone. (Carangirue.) 

 d. Dorsal outline not less curved than ventral, 

 tj. D. and A. each with one free finlet; body slender. 



Decaptercs, 132. 

 ee. D. and A. without finlets. 

 /. Lateral line with well developed scutes for its entire length. 



Trachurus, 133. 



Xf- Lateral line with scutes on its straight posterior portion only 



(these sometimes few and small in species with the body 



compressed). 



g. Shoulder girdle with a deep cross-furrow at its junction with 



the isthmus; body oblong Trachukops, 134. 



ffff. Shoulder girdle normal. 

 h. Body oblong or moderately elevated, not as below. 



Caranx, 135. 

 hh. Body oblong-ovate, very strongly compressed, its out- 

 lines all trenchant, the anterior profile vertical; scutes 



almost obsolete Vomer, 136. 



fff. Lateral line without any scutes anywhere; body short and 



elevated, strongly compressed Selene, 137. 



dd,. Dorsal outline less strongly curved than ventral ; body compressed, 

 with trenchant outlines; scutes of lateral line obsolete. 



Chlokoscombrus, 138. 



