Jordan and Ever maim. — Fis/ies of North America. 897 



a. Dorsal anU anal without finlets. 



j. Lateral lino with well-ileveloped Boutcs for its outiro length; body 



eloiigtate. Tuachuuus, 416. 



jj. Lateral lino with scutos on its straight posterior portion only (these 



sonietinus very few :ind small, especially in thoso species with the 



hotlj' much compressed). 



k. Shoulder girdle with a deep cross furrow at its junction with tlio 



isthmus, above which is a fleshy projection; body elongate. 



TiSAClIUKOl'S, 417. 

 W.-. Shouldi'r girdle normal, its surface even; body deeper. 

 /. liody oblong or more or less elevated, not as below. 



m. Teeth of jaws in few series or in one series, une4Ual, or 

 at least not forming villiform bands, the out<r .series 

 above usually enlarged, the lower teeth usually uni- 

 serial. 

 n. Maxillary very narrow, its greatest width scarcely 14 

 eye; head small; lateral lino strongly arched in 

 front; teeth uniserial, those on palatines and 

 vomer minute or obsolete. Uemicau.\n.\, 41.'^ 



mi. Ma.\illary broad; head rather large; vomer and pala- 

 tines with teeth. C.\ranx, 419. 

 mm. Teeth of jaws cfiually small or wanting, forming villi- 

 form bands if present; maxillary broad; body com- 

 pressed; spinous dorsal weak, usually disappearing 

 with age. 

 0. Teeth very minute, disappearing in the adult; no teeth 

 on vomer or palatines; dorsal spines low and weak. 

 Gnathanodon, 420. 

 00. Teeth persistent, in bands; vomer and palatines with 

 minute teeth, 

 p. Soft dorsal with none of its rays produced in fila 

 ments; lateral line nearly straight; body 

 oblong. Caranqoides, 421. 

 iy). Soft dorsal with 1 to G rays produced in filaments. 

 7. Body moderately compressed; spinous dorsal 

 more or less persistent. Cn'ui.A, 422. 

 77. Body deep, greatly compressed, its edges all 

 trenchant, 

 r. Soft dorsal lobe very high, filamentous. 



Alectis, 423. 

 rr. Soft dorsal lobe low. 



IlYNNlS, 424. 



U. Body liniad ovate, very strongly compressed, its outlines 

 everywhere trenchant, the anterior j)rofiIc nearly verti- 

 cal; scutes almost obsolete. Vomer, 425. 

 jj). Lateral line without any scutos; body short and elevated, strongly 

 compressed. Selene, 426. 

 Ciilokoscombuin.e : 



/(/(. Dorsal outline less strongly curved than ventral; body much compressed, its 

 outlines everywhere trenchant; armatui-e of lateral line obsolete or 

 nearly so. Chloroscombrus, 427. 



TuACHINOTINiE : 



ijij. Maxillary without supplemental bone; anal fin similar to soft dorsal, its base much 

 longer than abdomen; tail unarmed; pectoral short, not falcate. 

 s. Forehead convex; teeth small or deciduous. Trachinoti'S, 428. 



* A detailed account of the American species of Carang'miz is given by Jordan & Gilbert,. Proc. 

 U. S. Nat. Mus., 1883, 188-207. 



V. N. A. 58 



