188 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



pressed, margins finely serrated and 5 small cusps externally; nos- 

 trils little nearer front end of snout than mouth, with small flaps, 

 internarial half mouth width; interorbital 1% in head, convex. 

 Third gill opening largest, last 2 over pectoral base. 



Scales broadly though slightly trilobate, each with 3 ridges. 



First dorsal origin close behind pectoral base, front fin edge li/^ 

 in head; second dorsal length 2; anal length 2i/^; least depth of 

 caudal peduncle 5%; pectoral I14, width 1% its length, which 21/3 

 to ventral ; ventral length 2 in head ; caudal nearly 2 in rest of body, 

 subcaudal 2% in caudal. 



Slaty gray, paler below. In smaller examples upper surface of 

 body and pectoral, also dorsal and caudal, variegated with deep 

 leaden gray blotches, many on side of trunk more or less elongate 

 and vertical. 



Bed Sea, Arabia, Natal, India, Ceylon, East Indies, Indo-China, 

 China, Japan, North Australia, Queensland, New South Wales, 

 South Australia, Western Australia, New Zealand, Lord Howe 

 Island, Melanesia, Hawaii. In the Eastern Pacific in the Galapagos 

 Islands and California. Also in the Atlantic. One, 3,050 mm., in 

 the Queensland Museum from Moreton Bay. 



1 example. A.N.S.P. Padang, Sumatra. A. O. Harrison and H. L. Hiller. 

 Length, 995 mm. 



Genus GALEORHINUS Blainville 



Oaleorhinus Blainville, Bull. Soc. Pliilom., Paris, vol. 8, p. 121, 1816. (Type, 



Squalus galeus Linnaeus, designated by Gill, Ann. Lyceum Nat. Hist. New 



York, vol. 7, p. 402, 1862.) 

 Oaleus ScHAEFFER, Epistola Studii. Ichth., p. 20, 1760. (Atypic. Type, Squalus 



galeus Linnaeus). — (Klein) Walbaum, Artedi Pise, vol. 3, p. 580, 1792. 



(Type, Squalus galeus Linnaeus.) (Inadmissible.) 

 Emissola Jaeocki, Zoologia, vol. 4, p. 448, 1822. (Type, 'TEmissole"= Squalus 



galeus Linnaeus. Not consulted.) 

 Eugaleus Gill, Proc. Acad. Nat. Sci. Philadelphia, 1864, p. 148. (Type, Squalus 



galeus Linnaeus, orthotypic.) 

 Notogaleus Whitley, Australian Zool., vol. 6, p. 310, 1931. (Type, Oaleus 



australis Macleay, orthotypic.) 



Body moderately long, slender, cavity about one-half total length. 

 Head moderate. Snout obtuse, depressed. Orbit longer than wide, 

 with nictitating membrane. Mouth wide, crescentic, with short 

 labial fold on each jaw. Teeth alike in two jaws, oblique, com- 

 pressed, subtriangular, notched, inclined toward mouth angles, 

 smooth on edges except two to four denticles on outer edge between 

 notch and base. Last gill opening above pectoral. Spiracle small, 

 behind eye. First dorsal above space between pectorals and ven- 

 trals; second dorsal above anal. Caudal rather short, with single 

 notch; subcaudal lobe present, not very remote from notch behind 

 subcaudal. No pit at caudal base. 



