FISHES OF HAW All AFT ISLANDS. 
123 
Scales moderately large and narrowly imbricated, those on middle of back enlarged; no fin flaps; 
scales on cheeks, opercles and a number of small ones on top of head; lateral line running low or 
along the ventral part of the body, and posteriorly below keel on side of caudal peduncle; origin of 
dorsal a little nearer that of ventral than base of caudal and well behind anal; anterior dorsal rays 
longest, the posterior or last rays also elongated, longer than middle ones but not as long as the 
anterior; anal with anterior rays longest; caudal deeply emarginate, the rays strong, the lower lobe 
the longer, and the entire length of the fin a little more than that of pectoral; pectoral with rays all 
more or less firm and strengthened, the uppermost enlarged; ventrals rather short and placed a little 
nearer base of pectoral than base of caudal; caudal peduncle very broad and depressed, its greatest 
width twice its least depth, and with a sharp keel along each side. 
Color in alcohol, deep blue-black above, sharply defined along the sides from the silvery white of 
the lower surface; pectoral, ventrals, and anal all more or less grayish. In the young there is a black 
lateral band and the dorsal is high. 
This description is from an example (No. 04992) 14 inches long, taken at Kailua. We have a 
number of examples taken at Honolulu and Kailua. Several were obtained by Dr. Jenkins at 
Honolulu in 1889, and others by the Albatross in 1902. The species also occurs in Samoa. 
Belone platyurus Bennett, Proc. Comm. Zool. Soc. London, 1830,168, Mauritius; Jenkins, Bull. II. S. Fish Comm., XXXI, 1902 
(Sept. 23, 1903), 433 (Honolulu). 
Belone platura, Riippell, Neue Wirbelthiere, Fisch., 1837, 73, pi. 20, fig. 1 (Red Sea); Cuvier & Valenciennes, Hist. Nat. 
Poiss., XVIII, 451, 1846 (Massawah); Bleeker, Act. Soc. Sci. Indo-Neerl., II, 85, 1857; Gunther, Cat., VI, 237, 1866 
(Red Sea, Mauritius, Amboyna); Streets, Bull. U. S. Nat. Mus., No. 7, 75, 1877 (Honolulu); Steindachner, Denks. 
Ak. Wiss. Wien, LXX, 1900, 30 (Laysan) ; Snyder, Bull. U. S. Fish Comm., XXII, 1902 (Jan. 19, 1904), 521 (Honolulu). 
Belone carinata Cuvier & Valenciennes, Hist Nat. Poiss., XVIII, 437, 1846, Hawaiian Islands; Gunther, Cat., VI, 236, 1866 
(copied). 
Mastacembelus plalurus, Bleeker, Nat. Tyds. Dierk., Ill, 1866, 234 (Singapore; Amboyna). 
Genus 70. TYLOSURUS Cocco. 
Body elongate, very slender, not much compressed ; both jaws prolonged into a beak, the lower 
jaw somewhat the longer, much the longer in young fishes, the very young resembling Herairamphus; 
each jaw armed with a band of small, sharp teeth, beside which is a series of longer, wide-set, sharp, 
conical, unequal teeth ; no teeth on vomer or palatines; scales small, thin; lateral line running along 
side of belly, becoming median on the tail, no finlets, dorsal fin more or less elevated anteriorly; caudal 
fin short, unequally lunated or forked; pectorals moderate; ventrals small, the latter inserted behind 
the middle of body; gillrakers obsolete; bones usually more or less green; size comparatively large. 
Species numerous. Voracious fishes, chiefly American, one species crossing to Europe; some of them 
entering rivers. 
Only one species is known to occur in the Hawaiian Islands. 
Tylosurus Cocco, Lettere in Giornale Sci. Sicilia, XVII, 18, 1829 ( cantraini=imperialis=acus ). 
