TRICHIURUS NITENS. 69 
those found in the Atlantic. The fin rays of an individual in hand, 
which may belong to the form G. ¢hyrsitoides Less., are numbered as 
follows : 
DAO IEE Gee A. Ul 6s Val; P..13. 
Obtained off the Cocos Islands. 
Trichiurus nitens sp. n. 
B.6; D. 120-127; A. 94-103; P. 11. 
This species is closely allied to Zrichiwrus lepturus Linné, 1758. Com- 
pared with specimens of that species it differs enough, in length of snout, in 
size of eyes, and in numbers of fin rays, to warrant separation. The two 
forms are very similar in general features and without close examination 
would readily be passed as identical. 
One individual of several at hand of the Atlantic 7. /epturus has one hun- 
dred and thirty-four rays in the dorsal and one hundred and one in the anal, 
another has one hundred and thirty-seven dorsal rays and one hundred 
and six anal rays; the eye is two thirteenths of the length of the head; 
the length of the upper jaw from the eye forward is twice the length of the 
latter or a little more; the total length is eight times the distance from the 
snout to the base of the pectoral; and the depth is one sixteenth of the en- 
tire length. 
In 7. nitens the length of the head to the base of the pectoral is contained 
seven and one third to seven and one fifth times and the depth seventeen 
and one half to nineteen times in the total length. Body and head com- 
pressed, depth two fifths of the length of the head, tapering from the body 
cavity to a thread-like extremity in the tail. Head tapering, pointed at the 
snout. Snout elongate, pointed; upper jaws shorter, massive; lower jaws 
longer, more slender, bearing a pair of fangs in front of the ends of the 
upper jaws. Nostril moderately large, lateral, vertically oblong, near the 
top of the head, near the eye. Mouth wide, anterior, horizontal; maxillary 
hidden, extending but little below the eye, hind end rounded. Teeth 
small, compressed, sharp, in single series on each jaw, larger toward the 
middle of the series and very small toward the ends; three to four or more 
large fangs, each with a barb near the point, below the forward portion of 
the upper half of the snout each fang being nearly half as long as the eye. 
Eye large, lateral, one and three fifths to one and three fourths times in the 
