THE FISHES OF NEW JERSEY. 239 



Scomber colias Gmelin. 



Mackerel. Thimble Eye ^lackerel. Fall ^Mackerel. Chub 



Mackerel. 



Head 39/6; depth 5; D. X-I-I, 10, 5; A. I-i, 11, 5; width of 

 head 1% in its length; depth of head over posterior margin of 

 eye 1%; snout 3%; eye 4j^ ; maxillary 2^/7; interorbital space 

 3J/3 ; second dorsal spine 2 ; second dorsal ray 4}4, ', first anal ray 

 4% ; upper caudal lobe i^ ; pectoral 2; ventral 2^ ; least depth 

 of caudal peduncle y^i. Body fusiform, elongate, little com- 

 pressed, and rather plump. Caudal peduncle slender, without 

 keel. Head pointed, compressed. Snout conic. Eye circular, 



^flis^^ 



m 





^^^ 





^-^-^^r''\ 



^?$v' , 







^- • '^ 





f 









Chub Mackerel. 



Scomber 



colias Gmelin. 





with broad adipose eyelids. Mouth rather large, inclined, and 

 jaws about even. A single row of small slender teeth in each 

 jaw and on vomer and palatines. Interorbital space broadly con- 

 vex, flattened medianly, and with rather large translucent area 

 anteriorly, also with 2 parallel bony ridges. Subopercle more 

 elliptical than triangular. Gill-rakers 10-I-25, strong, spinescent, 

 a little less than longest filaments and about i J4 in orbit. Inside 

 of gill-opening with a depression on shoulder-girdle below. 

 Large radiating scales at posterior border of eye. Lateral line 

 slightly w^avy. Spinous dorsal inserted nearer tip of snout than 

 origin of rayed dorsal, and second spine longest. Rayed dorsal 

 inserted nearer origin of spinous dorsal than base of caudal, first 



