FISHES OF THE PHILIPPINE ISLANDS AND ADJACENT SEAS 253 



teeth in 40 rows above, 44 rows below, tricuspid, median cusp largest ; 

 nostrils large, % horizontal eye diameter, internarial space 2 in 

 mouth; interorbital broad, depressed. Gill openings half of eye. 

 Spiracle superior, close behind eye, 2i/^ in eye. 



Body largely smooth, only scattered small, inconspicuous sparse 

 short filaments visible with lens. 



First dorsal length 1% in head, fin inserted well behind pectoral 

 base, spine 1% in second dorsal spine; second dorsal length 1% in 

 head, spine I14 in interorbital ; caudal length 3 in rest of body ; sub- 

 caudal lobe nearly large as second dorsal, not hollowed out as shown 

 in Gilbert's figure; pectoral 1% in head, not foreshortened as in 

 Gilbert's figure; ventral 11/2, moderate, base entirely before second 

 dorsal base. 



Dark brown, lower half or more of body darker, thus belly much 

 darker than back. Sides and back, also top of head with variable 

 pale blotches, due to torn areas in thin skin. Fins all bordered 

 broadly with whitish. Iris slaty. Lower surface of body especially 

 with dusky to blackish brown dots, distinct under a lens, also showing 

 less so and sparsely over back. 



Galapagos and Hawaiian groups in deep water. 



Gilbert's Centroscyllium ruscosum was founded on the type, de- 

 scribed above, and a paratype 400 mm. long, an adult male. Its scales 

 are said to be rather distinct fine prickles on small stellate bases. 

 Many of teeth with 4 or 5 cusps. Claspers reaching over halfway to 

 subcaudal origin, each with pair of lateral slender hooked subterminal 

 spines, between which median soft prolongation tapering to point 

 and bearing terminal prolongation of groove. White margin of fins 

 narrower than in the type, a feature in agreement with Garman's 

 original figure of CentroscyUkim nignrnv. 



U.S.N.M. No. 51585. Near Kauai, in 418-429 fathoms. Albatross collection. 

 Length, 215 mm. Type of Centroscyllium ruscosum. 



CENTROSCYLLIUM RITTERI Jordan and Fowler 



Centroscyllium ritteri Jordan and Fowler, Proc. U. S. Nat. Mus., vol. 26, p. 635, 

 fig. 6, 1903 (type locality: Misaki). — Gabman, Mem. Mus. Comp. Zool., vol. 

 36, p. 232, 1913 (Misaki).— Izuka and Matsutjra, Cat. Zool. Spec. Tokyo 

 Mus. Vertebrata, p. 189, 1920 (Misaki).— Fowlee, Proc. 4th (1929) Pacific 

 Sci. Congr., Java, p. 496, 1930 (Japan). 



Centroscyllium faWicii (not Reinhardt) Rtoan, Ann. Mag. Nat. Hist., ser. 8, 

 vol. 2, p. 40, 1908 (note). 



Depth 6% to subcaudal origin; head 414. Snout 3% in head; 

 orbit 31/^, about equals snout; preoral length 2 in head, about equals 

 mouth width and labial fold at each mouth corner; teeth tricuspid, 

 alike in both jaws ; nostrils large, inferior, midway in snout ; interor- 



