714 GEOLOGICAL SURVEY OF NEW JERSEY. 



ORYCNUS, Cuv. 



(Thynnus.) 



O. thynnus, L. (secundo-dorsalis,vulgaris,&c.) Horse Mackerel. Tunny. 

 Albicore. 



Body robust ; tail slender ; an obscure corselet ; pectorals do 

 not reach beyond end of first dorsal ; color dark blue above ; 

 below grayish, with silvery spots ; mouth large. Dorsal rays, 

 XIV I, 13 IX; anal rays, I, 12 VIII. Attains a length 

 of 10 feet or more. 



" The writer has never seen a specimen of this large fish from 

 New Jersey, but it is fair to suppose it occasionally is met with, 

 as it is taken off Long Island frequently." [C. C. A.] 



Family CARANGIDJE. 



Pilot-fishes. 



Body compressed, with prominent occipital keel ; usually with 

 small cycloid scales ; teeth generally small ; premaxillaries protractile ;. 

 spinous part of dorsal weak ; anal always with two spines ; air- 

 bladder often forked behind ; vertebrae about twenty-five. 



DECAPTBJRUS, Bleek. 



D. punctatus, Ag. (Caranx.) Scad. Spotted Caranx. Round Robin, 

 CJgar-fish. 



Body spindle shaped ; head short ; mouth small, with feeble 

 teeth ; premaxillaries protractile ; scales enlarged along posterior 

 straight part of lateral line ; one finlet after second dorsal 

 and anal ; bluish above ; silvery below, with a dark opercular 

 spot; pectorals short; eye small. Length, 12 inches; dorsal 

 rays, VIII I, 301 ; anal rays, II I, 241. 



" This is a seldom-met-with species of Caranx, that is to be 

 included in our list from a specimen taken near Cape May, and 

 now in the museum of the Philadelphia Academy." 



