NO. 1877. NEW PHILIPPINE SQUALOID SHARKS— SMITH. 683 



tip of caudal to middle gill slit and well in advance of second dorsal 

 spine, the modified rays (claspers) long, straight, and acutely pointed; 

 pectorals large, broad, length from last gill slit .5 head, the posterior 

 margin straight, the rays reaching vertical from base of dorsal spine. 



Color: Uniform dark brown. 



Type. — Cat. No. 70258, U.S.N.M., a male specimen 44 cm. long, 

 taken with a beam trawl on August 1, 1909, at station 5491 (lat. 9° 

 24' N.; long. 125° 12'' E.), between the islands of Leyte and Min- 

 danao, at a depth of 736 fathoms, on a bottom of green mud and 

 coral. 



The collection contains six additional specimens, as follows, all 

 taken with the beam trawl in water from 392 to 976 fathoms deep: 

 Station 5219, between Marinduque and Luzon, April 23, 1908, 530 

 fathoms, one female specimen 44 cm. long; station 5491, between 

 Leyte and ^Mindanao, August 1, 1909, 736 fathoms, one female 

 specimen 50.5 cm. long; station 5495, between Leyte and Mindanao, 

 August 1, 1909, 976 fathoms, one female specimen 59 cm. long; station 

 5511, off Camp Overton Light, northern Mindanao, August 7, 1909, 

 410 fathoms, two specimens 21 and 33.5 cm. long; station 5527, 

 between Siquijor and Bohol Islands, August 11, 1909, 392 fathoms, 

 one specimen 22.5 cm, long. 



SQUALIOLUS Smith and Radcliffe, new genus. 



Squaloid sharks with subcylindrical body, much contracted caudal 

 peduncle; cylindrical head, conical snout; erect lanceolate, unicuspid 

 teeth in upper jaw, obhque teeth with laterally deflected points in 

 lower jaw; small first dorsal fin with naked spine; long, low second 

 dorsal without vestige of spine; very short and broad caudal fin with 

 straight tail; ventral fins far behind middle of body and under origin 

 of second dorsal; entire body covered with flat, widely separated 

 quadrate denticles. 



The presence of a spine in the anterior dorsal fin and the entire 

 absence of one in the posterior dorsal necessitate a modification in 

 the current definition of the SquaUdffi, and perhaps justify the insti- 

 tution of a new subfamily when taken in connection with other char- 

 acteristic features of this genus — form of head, second dorsal and 

 caudal — that are possessed by no other members of the family. 

 The pecuhar shape of the caudal is approached, but not attained, by 

 Lamna and other large typical sharks. 



Genotype. — Sgualiolus laticaudus. 



