256 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



Depth 2%; head 3}^ Snout 3 in head; eye 3%, little less than 

 snout; maxillary reaches eye, length 2% in head; jaws about even; 

 interorbital rather low. 



Scales in lateral line about 45. Scaly sheaths of fins large (moderate 

 on figure). 



D. X, 9 (on figure IX, 10), second spine 2K in body depth; A. Ill, 8 

 (on figure II, 9); caudal well forked; least depth of caudal peduncle 

 2K; ventral little over half of head; pectoral reaches anal, 2% in com- 

 bined head and body to caudal base. 



Brilhantly silvery. Dorsal and caudal tips black (figure shows 

 uniform caudal). Length, 350 mm. (Alleyne and Macleay.) 



Queensland. Though the above account is from the original descrip- 

 tion and figure, both are imperfect. Its distinction from Gerreomorpha 

 japonica is largely uncertain. 



Genus PENTAPRION Bleeker 



Pentaprion Bleeker, Nat. Tijds. Nederland. Indie, vol. 1, p. 104, 1850. (Type, 



Pentaprion gerreoides Bleeker, monotypic.) 

 Clara Gill, Proc. Acad. Nat. Sci. Philadelphia, 1862, p. 127. (Type, Equula 



longimana Cantor, monotypic.) 



Body compressed, rather deep, oblong. Eye moderate. Mouth 

 very protractile, descending as thrust out. No teeth on palate. 

 Branchiostegals 6. Scales moderate, not ciliated, deciduous, 44 to 

 48 in median lateral series. Dorsal with deep notch marking spinous 

 and soft fins, spines 9 or 10, rays 14 or 15. Anal with 5 or 6 spines 

 and 12 or 13 rays. Caudal forked. 



One species. 



PENTAPRION LONGIMANUS (Cantor) 



Equula longimana Cantor, Journ. Asiat. Soc. Bengal, vol. 18, p. 1134, 1849 

 (1850) (type locality: Malayan Peninsula; islands, Malacca Straits). 



Equula longimanus GtJNTHER, Cat. Fish. Brit. Mus., vol. 3, p. 505, 1860 (type). 



Pentaprion longimanus Day, Fishes of India, pt. 1, p. 101, pi. 52, fig. 6, 1876 

 (Madras).— Bleeker, Atlas Ichth. Ind. N^erland., vol. 8, p. 130, pi. (78)362, 

 fig. 2, 1876-1877 (Sumatra, Java, Celebes). — Day, Fauna Brit. India, vol. 1, 

 p. 540, fig. 164, 1889. — Fowler, Journ. Acad. Nat. Sci. Philadelphia, ser. 2, 

 vol. 12, p. 517, 1904 (Padang). — Jordan and Seale, Bull. Bur. Fisher., 

 vol. 26, p. 24, 1906 (1907) (Cavite). — Pearson, Ceylon Administr. Rep., 

 1915-1918, pp. F9, F16, F18.— Fowler and Bean, Proc. U. S. Nat. Mus., 

 vol. 62, art. 2, p. 42, 1922 (Takao). 



Pentaprion gerreoides Bleeker, Nat. Tijds. Nederland. Indie, vol. 1, p. 104. 

 1850 (type locality: Batavia). — GUnther, Cat. Fish. Brit. Mus., vol. 1, 

 p. 396, 1859 (copied). 



Depth 2% to 2%; head 3% to 3/2, width \% to 2. Snout 3^ to Z% 

 in head; eye 2% to 3, greater than snout, subequal with interorbital; 

 maxillary nearly or quite reaches eye, expansion 2% to 3 in eye, length 

 2K to 3 in head ; interorbital 2?^ to 3, broadly convex. Gill rakers 4 or 

 5 + 13 or 14, lanceolate, equal gill filaments or ){ to Yz of eye. 



