448 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 
fius 2, the anterior of about 8 weak, low spines, connected by membrane 
and depressible in a groove ; second dorsal long, similar to the elongate 
anal, both fins being densely scaly ; fin-rays slender. Two very small, 
free, anal spines, sometimes hidden in the skin. A^entrals thoracic, I, 5. 
Pectorals rather short. Caudal fin forked, the lobes broad. Air-blad- 
der simple, with thin walls. Pyloric coeca very numerous. Yertebrm 
10 + 14, as ill Carangidw. A single species, found in nearly all warm 
seas. This family is closely related to the Carangidw, from which group 
it is an offshoot toward the Percoids. 
(Carangidw, genus Temnodon Giintber, ii, 479-480.) 
230 .— POMATOMUS Lacdp^de. 
Blue-fish. 
(Temnodon Cuvier.) 
(Lac^pMe, Hist. Nat. Poiss. iv, 436, 1802: type Pomatomus skib Lac. = Gastero8teus sal- 
tatrix L.) 
Characters of the genus includetl above, {-diixa, operculum ; TO[j.oq, 
cutting; from the serrated preopercle.) 
’ 70 §. P. saSlalor (L.) Gill. — Blue-fish; Gncn-fish; Ship-jack. 
Bluish or greenish, silvery below; a black blotch at base of pectoral. 
Body robust, moderately compressed ; belly compressed to a bluntish 
edge. Head deep ; top of head and a ridge on each side above the 
cheeks naked. Cheeks much longer than the opercles. Pectorals placed 
rather low, their length a little more than half that of the head. Head 
3i; depth 4. H. YIII-I, 25; A. II-I, 26; Lat. 1. 95. L. 3 feet. ‘Atlantic 
and Indian Oceans; of late years very abundant on our Atlantic coast; 
a large, voracious fish, extremely destructive to other fishes ; valued for 
food. 
(Perea salfatrix L. Syst. Nat. xi, 1760, i, 293: Gasicrosiens saltairix L. Syst. Nat. xii, 
1766: Temnodon sallaior Cuv. &, Val. ix, 225: Temnodon salfator Storcr, Hist. Fish, 
Mass. 360: Temnodon saltator Gunther, ii, 479.) 
Family LXXVI (Z>).— XOMEID^. 
{The Nomeids.) 
Scombroid fishes with the body oblong, more or less compressed, 
covered with cycloid scales of moderate size, Yertebrte more than 
10-1-14, as in Scombridx and Stromateidw. Month large or small, 
usually with minute teeth ; premaxillaries jirotractile ; maxillary narrow. 
Gill-membranes separate, free from the isthmus; pseudobranchim large. 
Xo tooth-like processes in the oesophagus. Preopercle entire, or crenu- 
