THE FISHES OF NEW JERSEY. 239 
Scomber colias Gmelin. 
Mackerel. Thimble Eye Mackerel. Fall Mackerel. Chub 
Mackerel. 
Head 354; depth 5; D. X—I-I, 10, 5; A. IH, 11, 5; width of 
head 17% in its length; depth of head over posterior margin of 
eye 17%; snout 3%; eye 4%; maxillary 2*/,; interorbital space 
3%; second dorsal spine 2; second dorsal ray 4% ; first anal ray 
4%; upper caudal lobe 134; pectoral 2; ventral 2%; least depth 
of caudal peduncle 734. Body fusiform, elongate, little com- 
pressed, and rather plump. Caudal peduncle slender, without 
keel. Head pointed, compressed. Snout conic. Eye circular, 

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-+25, strong, spinescent, 
a little less than longest filaments and about 11% in orbit. Inside 
of gill-opening with a depression on shoulder-girdle below. 
Large radiating scales at posterior border of eye. Lateral line 
slightly wavy. 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 
