[SCIENTIFIC RESULTS OF THE PHILIPPINE CRUISE OF THE FISHERIES STEAMER 

 "ALBATROSS," 1907-10.— No. 15] 



THE SQUALOID SHARKS OF THE PHILIPPINE ARCHI- 

 PELAGO, WITH DESCRIPTIONS OF NEW GENERA AND 

 SPECIES. 



By Hugh M. Smith,* 



United States Deputy Commissioner of Fisheries 

 and Director of the Albatross Philippine Expedition. 



No sharks of the family of Squahdse have up to this time been 

 recorded from the Phihppine Islands. The Albatross collection con- 

 tains numerous specimens representing six species: two of them are 

 Japanese and the remaining four are undescribed. Two of the 

 latter belong in known genera, while each of the other two necessi- 

 tates the erection of a new genus for its accommodation. All of 

 the species herein noted inhabit rather deep water and are of small 

 size. 



The genera of squaloid sharks represented in the Philippine fauna 

 may be diagnosed as follows: 



Key to genera of Philippine squaloid sharks. 



a. Both dorsal fina well developed and elevated, and each with a conspicuous ante- 

 cedent spine; caudal fin more or less elongate; snout not conical. 

 b. Snout of moderate breadth and depressed but not flat. 

 c. Teeth in upper jaw simple, without basal cusps. 

 d. Teeth alike in both jaws, with laterally deflected point and horizontal or 



oblique cutting edge Squalus. 



d^. Teeth imlike in both jaws, those in upper jaw erect or nearly so, those in 



lower jaw oblique, with laterally deflected point Lepidorhimus. 



c' . Teeth in upper jaw with two or four basal cusps Etmopterus. 



b^ . Snout very broad and flat Nasisqualus. 



a'. Both dorsal fins small; second dorsal very long and low, without vestige of spine; 

 caudal fin comparatively short and broad ; snout conical Squaliolus. 



SQUALUS PHILIPPINUS Smith and Radclifie, new species, 



Plate 51. 



Body rather slender, moderately compressed, back somewhat 

 elevated; caudal peduncle long, depressed, .5 head, least depth .25 

 length, a depressed keel on either side; tail not bent upward head; 



> In the study of this collection the writer has been assisted by Mr. Lewis Radcliflfe, who becomes joint 

 authority for the new genera and species described. 



Proceedings U. S. National Museum, Vol. 41— No. 1877. 



677 



