406 NEW YORK STATE MUSEUM 



Tet rapt 1(1- US albidiis Pof.y, Memorias, II. 237, 1861, Havana; Jordan & 



GiLHEUT, Bull. 16. U. S. Nat. Mus. 420, 1883. 

 Hisfiophorus helone Gunther, Cat. Fish. Brit. Mus. II, 513, 1860. 

 Tetropturus imperator Goode. Proc. U. S. Nat. :Mus. IY, 417, 1882; Jordan 



& EvERMANX. Bull. 47, U. S. Nat. Mus. 892, 1896; Smith, Bull. U. S. F. C. 



XVII. 97. 1898. 



Body similar in shape to that of the sailfish, its greatest depth 

 contained six and one fourth times in total length without 

 caudal; the least hight of caudal peduncle one fourth of the 

 greatest depth. The head forms one third of total length with- 

 out caudal; the upper jaw is exactly twice as long as the post- 

 orbital part of the head and extends beyond tip of mandible a 

 space equal to length of eye and postorbital part of head com- 

 bined; the maxilla extends far behind the eye; the eye is about 

 one fifth as long as postorbital part of head. The dorsal begins 

 on tlie nape, over the upper angle of the gill opening. The first 

 dorsal occupies nearly one half of the total length without 

 caudal; its anfoiior sixth is elcAated and the rest of the fin 

 is low; the longest spine (the fourth) is about one third as long 

 as the head, the 10th is only one seventh as long as the head^ 

 and tlic last is scarcely one half as long as the eye. Th^ inter- 

 space between the dorsals is three elevenths of length of head. 

 The second dorsal base is one seventh as long as the head; its 

 first ray is one and one half times as long as the eye, and its 

 last ray is about (Mjually long, but some of the intervening rays 

 ai-e shorter. The caudal fin is narrow, crescentic, its width at 

 base of lobes (ne fourth of its length, the external i-ays equal 

 'o om- foniih ihe distance from eye to caudal base. The first 

 anal liii originates under the I'lMli ray of the dorsal; the base 

 is one fourth as long as ihe head; the longest ray two sevenths 

 as long ;is the hcnd, the last v:\\ minute. Tin- interspace be- 

 tween (he iiiinis is one third as long as the head. The base 

 of ihe seroiiii aii;il eijuals onc tliinl oi postorbital length of 

 head. I he liisl and last lays e(inal. ami as long as the base of the 

 'ill- 'he Intel \eiiii,n i;,vs sliorlcr; two strong keels on the base 

 <'f 'he iaiiilal. each of them about twice as loijg as the eye. 

 'I'lii- \<iiiral is \(i\ slender ami long; it originates under the 

 "'"'I' '';'.\ "f 'li'- iloisal, its length ('(pial to postorbital [lart of 



