THE FISHES OF NEW JERSEY. 295 
Oceanic or pelagic fishes resembling the sword fishes, but 
smaller in size. Several fossil forms have been recorded. One 
genus on our shores. | 
Genus IstropHorus Lacépede. 
The Sail Fishes. 
Istiophorus nigricans (Lacépéde). 
Sail Fish. 
Head, measured to tip of beak, 175; depth 934; D. XLH, 11, 
Gon A> X1V,8, £; P. 1, 16; V..1, 1, 13 scales about 213 in lateral 
Sail Fish. Jstiophorus nigricans (Lacépede). 
line and about 13 more counted to base of caudal; about 18? 
scales in a vertical series between origin of second dorsal and 
lateral line; about 24 scales in a vertical series between origin of 
anal and lateral line; depth of head at occiput 4% ; width of head 
9%; postocular part of head 5 in rest of its length; mandible 1*/, 
in head measured from its own tip; twenty-first dorsal spine 1% 
in head measured from tip of beak; lower caudal lobe, measured 
from its origin, 24/,; ventral 134; eye 3% in postocular region; 
interorbital space 234; first dorsal ray 3'/,9; sixth anal spine 
134; first anal ray 344; least depth of caudal peduncle 3%; 
pectoral 114. Body long, slender, strongly compressed, and with 
