flO. 1319. 



SOifE JAPANESE FISHES— JORDAN AND STARKS. 



539 



about 50. Intestinal canal simple, without cceca. Carnivorous or 

 herbivorous. Abounding in all warm seas, mostly pelagic, swimming- 

 laear the surface, and skipping or sailing through the air, sometimes 

 [for considerable distances. 



'. i;ix)f of mouth nearly toothless; pectoral and ventral fins very long, both used as 



organs of flight. 

 |l b. Anal fin long, its base al)Out equal to that of dorsal, its rays 11 or 12. 



Exonautes, 4. 

 bb. Anal fin short, notably shorter than dorsal, its rays 9 or 10 Cypsilurus, 5. 



4. EXONAUTES Jordan and Evermann. 



Exonautes Jordan and Evermann, Check List Fishes N. Amer., 1896, p. 322, 



{exsiliens. ) 



This genus includes those %ing fishes having both pectoral and 

 iventral elongate and the anal fin about as long as the dorsal fin, of 11 

 or 12 rays. 



; Species numerous, smaller in size than those of Oypselurus, although 

 larger than those of Eoaocmtus proper. 



(f'^o, out of; vavrr}z^ swimmer.) 



9. EXONAUTES BRACHYCEPHALUS (Giinther). 



Exoccetus Jn-dchycepladus GiJNTHEE, Cat. Fish., VI, 1866, p. 297; China. — Lutken, 

 Vid. Med. Nat. Foren, 1876, pp. 110, 405. 



Head, -1^ in length; depth, 6^. Dorsal, 11; anal, 12; scales, 49. Eye, 

 3^ in head. 



Snout short, H in diameter of eye; interorbital space broad, its 

 width a little greater than diameter of eye; supraorl)ital region pro- 



FiG. 2.— Exonautes BEACHvcEPHALrs. 



trading on each side, making interorbital concave; maxillary reachingto 

 just below anterior margin of eye. Thirty-four scales on a median line 

 of back before dorsal. Lateral line forming a more than usuallv con- 

 spicuous ridge along lower sides of belly. Pectoral reaching to tip of 

 declined anal ray; its first ray contained 2i times in entire fin and 

 exceeding the head in length by a distance equal to the diameter of 

 the eye. The outer half of the divided second ray fails to reach the 

 tip of the third or largest ra}^ by a distance equal to eye and snout; 

 the inner half extends nearly to the tip of the third. Ventrals inserted 



