92 TELEOSTEI : SYNENTOGNATHI. XVI. 



6. Body little compressed, its breadth more tlian I its greatest deptli. 



Tylosueus, 97. 

 bb. Body mucli compressed, its breadth not half its greatest depth. 



Athlennes, 98. 

 aa. Jaws with minute teeth or none. 



c. Maxillary grown fast to premaxillary; one or both jaws produced in 

 a long beals. 

 d. D. and A. with finlets ; scales small; both jaws produced. (Scorn- 



beresociruB) Scomberesox, 99. 



dd. D. and A. without finlets; upper jaw short, the lower much pro- 

 duced. (Hejniramphince,) 

 e. Pectorals moderate, not longer than head without beak; body 



rather stout; sexes similar Hemiramphhs, 100. 



ee. Pectorals very long, twice head without beak; V. short; body 

 very slender, almost band-like , . Euleptorhamphus, 101. 

 cc. Maxillary distinct from premaxillary ; both jaws short. (£xocce- 

 tincE.) 



f. Eoof of mouth with teeth; body elliptical in cross-section; V. 

 long, inserted behind middle of body ; D. high, its base about 

 equal to anal base ; snout and lower jaw short. 



Parexoccetus, 102. 

 ff. Eoof of mouth nearly toothless ; body quadrate in cross-section ; 

 P. long, about reaching base of C. 

 g, Ventrals inserted anteriorly, much nearer tip of snout than 

 base of C, small, not used as organs of flight. 



Haloctpselus, 103. 



gg. Ventrals inserted posteriorly, nearer base of C. than snout, 



used as organs of flight Exocoetus, 104, 



97. TYLOSURUS Cocco. (twXoj, callus, i. e. keel; ovpa, tail.) 



a. Caudal peduncle depressed, with a dermal keel. 

 6. D. and A. short, each of 14 to 16 rays; last rays of D. low; jaws slender. 



220. T. marinus (Bloch & Schneider). Gar-fish. Bill-fish. 



Needle-fish. Silver Gab. 

 Scales and bones green ; green, a silvery lateral band ; a dark 

 bar on opercles; P. pale. Head 2|; depth 5^ in head. Lat. 1. 300. 

 L. 4 feet. Maine to Texas, abundant ; ascending rivers. 



bi. D. and A. long, each of 21 to 24 raj's ; last rays of D. sometimes ele- 

 vated; caudal keel black. 



221. T. acus (Lacepede). Houstd-fish. Agujon. Beak 

 long, twice rest of head. Green, no lateral stripe. Lat. 1. 380. L. 

 5 feet. West Indies and Mediterranean ; occasional N. to Cape 

 Cod. (£'«.) (Lat., needle.) 



98. ATHLENNES ^ Jordan & Fordice. (a/SXcvi/^f, without mu- 



cosity, an ancient epithet applied to Belone helone.) 



222. A. hians (Cuv. & Val.). Jaws long and very slender, the 

 upper arched at base, so that the mouth cannot be closed ; tail not 



* This name was inadvertently printed " Athlennes,'* and may remain so ; " AbleTi' 

 IKS" was intended. 



