THE FISHES OF NEW JERSEY. 265 
duced and serrated. Opercle ending in a flat point. Gill-mem- 
branes free from isthmus, not united. Gills 4, a slit behind fourth. 
Gill-rakers slender, rather few. Pseudobranchie large. Branchio- 
stegals 7. Air-vessel simple with thin walls. Pyloric cceca very 
numerous. Vertebre 10 + 14=24, as usual in Carangidce. 
Body covered with rather small weakly ctenoid scales. Cheeks 
and opercles scaly. Lateral line present, unarmed. Dorsal fins 2, 
anterior of about VIII weak low spines, connected by membrane 
and depressible in groove. Second dorsal long, similar to elon- 
gate anal, and both fins densely scaly. Fin rays slender. Anal 
with II very small free anal spines sometimes hidden in skin. 
Caudal forked, lobes broad. Pectoral rather short. Ventrals I, 
5, thoracic. 
A single genus and species in all warm seas closely related to 
the Carangide. 
Genus Pomatomus Lacépede. 
The Blue Fishes. 
Pomatomus saltatrix (Linnzus). 
Blue Fish. Mackerel. Snap Mackerel. Snapping Mackerel. 
Tailor. Snapper. Horse Mackerel. Skip Jack. 
Fliesde'3, > sdepti'377 72D: VINEE, 28; Aes Ne -27'; 'seales 
100 in lateral line to base of caudal, and about 6 more on latter; 
6 scales between origin of spinous dorsal and lateral line; . 17 
scales in a vertical series between origin of anal and lateral line; 
mandible 2 in head; least depth of caudal peduncle 334; pec- 
toral 134; ventral 224; snout 324 in head measured from tip 
of upper jaw; eye 6; maxillary 214; interorbital space 37/7. 
Body deeply robust and moderately compressed. Belly com- 
pressed to a bluntish edge. Head deep, and upper profile more 
oblique. Snout a little long, compressed, and convex. Eye 
small, circular, in first two-fifths of length of head. Maxillary 
curved, reaching posterior margin of eye, and its distal expan- 
sion 1% in orbit. Lips thick, teeth strong, and mandible well 
protruding. Nostrils together, high, and near upper front of 
