718 GEOLOGICAL SURVEY OF NEW JERSEY. 



TRACHYNOTUS, Lac. 



(Bothrolsemus. Doliodon.) 



T. carolinus, L. (pampanus.) Common Pompano. Carolina Lichia. 

 Spiny Dory (?). 



Body ovate, compressed ; abdomen not trenchant ; bead blunt ; 

 snout abruptly truncate; mouth nearly horizontal; teeth villiform, 

 deciduous; first dorsal of six spines, united in young, separate 

 in adult, and often disappearing ; three stout spines in anal ; no 

 caudal keel ; preopercle armed in young with three spines ; bluish 

 above ; sides silvery, becoming golden with age ; body without 

 dark bands, and no black (?) on vertical fins; fins silvery or 

 dusky. Soft rays, dorsal, 25; anal, 23; length, 18 inches. 



" This little fish is very abundant on our coast, and was met 

 with by Prof. Baird in large numbers about Beesley's Point." 

 A species with four vertical black bands under the dorsals, 

 known as T. glaucus, Gaff-topsail Pompano, ranges scarcely as 

 far north as New Jersey. The following is probably a stage of 

 preceding : 



" Trachynotus spinosus. Spinous Dory. 



" This species was found by Prof. Baird associated with T. 

 carolinus in very small numbers." 



NAUCRATBS, Raf. 



(Nauclerus, Cuv.) 

 N. ductor, L. (noveboracensis.} Pilot-fish. Romero. 



Differs from next only in having first dorsal of four or five 

 low, unconnected spines (connected in young) ; bluish, with five 

 to seven dark, vertical bars; little compressed, but elongate; 

 mouth small and oblique. Soft rays, dorsal, 26; anal, 16. 

 More abundant southward. 



" This species, although abundant elsewhere, and well known, 

 is not often seen in our waters. A specimen from Beesley's 

 Point is in the museum of the Philadelphia Academy." 



SBRIOLA, Cuv. 



(Halatractus, Gill.) 



S. carolinensis, Holb. (zonata, stearnsii.} Amber-fish. 



Occiput and breast not trenchant ; head conical ; mouth large, 

 with broad bands of villiform teeth ; lateral line nearly straight, 



