230 THE PLAGIOSTOMIA. 



Etmopterus granulosus. 



Spinax gra7iulosus Gunther, 1880, Challenger rept. Zool., 1, p. 19, pi. 2, f. C; 1887, Challenger rept. 

 Zool., 22, p. 4; Regan, 1908, Ann. mag. nat. hist., ser. 8, 2, p. 44. 



Snout blunt, much produced; symphysis of lower jaws midway from end 

 of the snout to the pectorals. Skin finely granulated, the granules being serially 

 arranged on the tail, where they appear rather in the form of minute spinelets. 

 Scales absent from the internarial space, below the median line of the snout, 

 the circumference of the mouth, the base of the fins, and the back of the tail. 

 Pectorals nearly reaching the first dorsal, truncated. First dorsal midway from 

 spiracles to second, shorter than the latter. Spine of second dorsal three times 

 the size of that of the first, not much lower than the fin; base equal one third 

 of the interdorsal space. Ventrals reaching below the middle of the second 

 dorsal. 



Type a male of ten and one half inches. 



Black, hind margins of fins white. 



Southwest coast of South America in 120 fathoms. 



CeNTROSC YLLIUM . 



Centroscyllium Muller & Henle, 1841, Plagios., p. 191. 

 Paracentroscyllium Alcock, 1889, Ann. mag. nat. hist., ser. 6, 4, p. 379. 



Body elongate, fusiform; tail shorter than the body cavity. Head broad; 

 snout short, depressed, blunt. Nostrils oblique, in the forward half of the snout. 

 Mouth wide, moderately arched, with a deep groove and labial folds at each 

 corner. Teeth small, raptorial, with three to seven sharp cusps. Eye large, 

 orbit elongate, no nictitating membrane. Spiracle behind the eye, at a higher 

 level, opening upward. Gill openings narrow, in front of the pectorals. Pec- 

 torals moderate, inner angle not produced. Dorsal spines much exposed, grooved 

 longitudinally on each side. First dorsal near the pectorals, second behind the 

 ventrals. No anal fin. Caudal without pits; subcaudal deep, without a much 

 produced lobe. Scales small, commonly with broad base and slender acuminate 

 cusp. 



Teeth 5 cusped on the lower jaws 



scales spinulate, with stellate bases .... nigrum (page 231) 

 Teeth 3 cusped on both jaws 



scales spinulate, with stellate bases 



snout from eye equal length of orbit . . fabricii (page 231) 



