FISHES OF THE PHILIPPINE ISLANDS AND ADJACENT SEAS 103 



Red Sea, Arabia, Zanzibar, East Africa, Madagascar, India, 

 Ceylon, Pinang, East Indies, Indo China, Philippines, China, For- 

 mosa, Riu Kiu, Japan, North West Australia, Queensland, New 

 South Wales. Specimens in the Queensland Museum from Little 

 Mulgi-ave River, Queensland. Also egg case of an example 3,535 mm. 

 from Stradbroke Island and egg case with young from the Aru 

 Islands, H. Macready, I. 2085. 

 1 example. A.N.S.P. Philippines. Commercial Museum Philadelphia. Length, 



356 mm. 

 1 example. A.N.S.P. Bombay, India. Dr. F. Hallberg. Length, 788 mm. 

 24149. Makassar, Celebes. December 22, 1909. Length, 274 mm. 

 13975. Makassar, Celebes. December 26, 1909. Length, 813 mm. 

 U.S.N.M. No. 49325. Massaua, Red Sea. Bellotti Collection. Length, 282 mm. 



With 28 transverse yellowish bars. 



Family ISURIDAE 



Body fusiform. Caudal peduncle depressed, with lateral keel each 

 side. Head subconic. Eye without nictitating ^olds. Mouth in- 

 ferior, large, crescentic, with labial folds. Teeth moderate, pointed. 

 Nostrils oblique, near mouth but not confluent with it. Gill opening 

 wide, before pectoral. Spiracle small. First dorsal large. Second 

 dorsal and anal small. Caudal much less than half, total length, 

 vertebral axis and fin much elevated backward from horizontal. 

 Caudal with pits. Pectorals falciform. 



ANALYSIS OF GENERA 



o\ Teeth with entire edges, awllike, with or without basal denticles. 



6\ Teeth without basal denticles at all ages Isurus 



&^ Teeth with one or more basal denticles each side, at least with age_ Lamna 



o'. Teeth with serrated edges, without basal denticles Carcharodon 



Genus ISURUS Rafinesque 



Isurus Rafinesque, Caratteri animali piante Sicilia, p. 11, 1810. (Type, Isnrus 



oxyrinchus Rafinesque, monotypic.) 

 Oxyrhina Agassiz, Poissons Fossiles, vol. 3, pp. 87, 276, 1836. (Type, Lamna 



oxyrhina Valenciennes, monotypic.) 

 Plectrostoma Gistel, Naturg. Thierreichs, p. x, 1848. (Type, Oxyrhina matv- 



telli Agassiz, orthotypic.) (Fossil.) 

 Isuropsis Gill, Ann. Lyceum Nat. Hist. New York, vol. 7, pp. 398, 408. 1862. 



(Type, Oxyrhina (jlauca Miiller and Henle, orthotjTic) 

 Anatodus Le Hon, Prelim. Mem. Poiss. Tert. Beige, p. 8, 1871. (Type, Anatodus 



agassizii Le Hon, monotypic.) (Fossil.) 



Body mackerellike or tunnylike, with slender caudal peduncle. 

 Snout pointed, rather long. Teeth awllike, long, lanceolate, cutting 

 edges sharp and entire, without basal cusps, base with 2 roots. Gill 

 opening wide, before pectoral. Spiracle behind eye or absent. First 



156861—41 8 



