104 THE PLAGIOSTOMIA. 



PSEUDOTRIAKIS. 

 Pseudotriakis Capello, 1867, Jor. sci. math. phys. nat. Lisboa, 1, p. 315, 321. 



Snout short, depressed, tapering, blunted at the end. Nostrils near the 

 mouth. Mouth very large, with short labial folds around the angles on both 

 jaws. Teeth numerous, small, with a strong median cusp, and with small 

 lateral cusps. First dorsal the longer, in advance of the ventrals; second dorsal 

 larger than the anal. Pectorals short, broad. Anal below the second dorsal 

 and smaller. Subcaudal not produced in a lobe. One species is described from 

 the North Atlantic and another from the Northern Pacific; they are not to be 

 distinguished by means of the present material. 



Pseudotriakis microdon. 



Pseudotriakis microdon Capello, 1867, Jor. sci. math. phys. nat. Lisboa, 1, p. 315, 321, pi. 5, f. 1; 



1869, Jor. Acad. sci. Lisbon, 7, p. 139; Bean, 1883, Proc. U. S. nat. mus., 6, p. 147; Goode & 



Bean, 1896, Mem. M. C. Z., 22, p. 18, pi. 5, f. 17; Jord. & Everm., 1896, Bull. 47, U. S. nat. mus., 



p. 27; 1900, ibid., Atlas, pi. 4, f. 14. 

 Pseudotriacis microdon GtJNTH., 1870, Cat. fishes Brit, mus., 8, p. 395; Regan, 1908, Ann. & mag. nat. 



hist., ser. 8, 1, p. 464. 



Body moderately stout, caudal region shorter. Head one fifth of the total 

 length, depressed; snout short, tapering, blunt. Mouth large, reaching forward 

 to nearly half way from eye to end of snout, in width equal to nearly three 

 times the preoral length. Spiracle moderate, length equal half the width of the 

 fourth gill opening. Hindmost gill opening above the pectoral. First dorsal 

 long and low, origin backward from the ends of the pectorals, distant from the 

 snout little more than twice the length of the pectorals. Second dorsal higher 

 and shorter than the first, base longer than the interdorsal space, hind angle 

 slightly produced. Anal entirely below the second dorsal, base about two 

 thirds of the length of that of the latter. Subcaudal without a produced lobe, 

 separated from the terminal by a notch, origin below the end of the anal fin. 

 Origins of the ventrals little in advance of the hind end of the first dorsal base. 



Brown, hind margins of ventrals, second dorsal, anal, and caudal darker. 



Atlantic; off the coasts of Portugal; off the east coasts of the United 

 States. Capello's type was captured off Setubal. 



Pseudotriakis acrages. 



Pseudotriakis acrales Jordan & Snyder, 1904, Smith, misc. coll., 45, p. 232, pi. 62. 

 Pseudotriacis acrales Regan, 1908, Ann. & mag. nat. hist., ser. 8, 1, p. 464. 



