LEPIDORHINUS STEINDACHNERI. 213 



anterior two fifths of the preoral length, internarial space about one fourth of 

 the rostral length from the mouth, anterior valve with a sharp angle. Eye large, 

 length of orbit less than its distance from the end of the snout, or more than 

 twice its distance from the spiracle. Mouth with a deep groove, and with short 

 labial folds on both jaws, at each angle. Upper teeth in front short, triangular 

 and nearly or quite erect in cusp, more oblique at the sides; lower teeth broader 

 with the cusp so much turned toward the angles of the mouth as to bring the 

 inner edge about horizontal. Gill openings, small, in front of the pectoral. Pec- 

 torals short, truncate, inner angle not produced. Dorsal spines strong, nearly 

 as high as the fins, exposed one fourth to one third of the length; dorsal fins 

 large, hind angle produced, upper broadly rounded. Origin of first dorsal above 

 the axil of the pectoral, end of fin reaching about three fifths of the distance to a 

 vertical from the ventrals. Second dorsal shorter and higher than the first, hind 

 angle less sharp; origin above the axils of the ventrals, fin reaching a vertical 

 from the origin of the caudal. Ventrals small, extremities below the middle of 

 the second dorsal. Caudal nearly one fifth of the total length; terminal portion 

 sub truncate; subcaudal very little produced anteriorly, separated by a shallow 

 indentation from the terminal. Scales close together, leaf-shaped with a strong 

 median keel and two weaker lateral keels the ends of which are produced. 



Grey to greyish brown, uniform. 



Type a 16 inch specimen taken by the Challenger in Sagami Sea, Japan, 

 in 345 fathoms. 



LePIDORHINUS STEINDACHNERI. 



Centrophorus slciadnchneri Pietschmann, 1907, Anz. Akad wiss. Wien, 44, p. 394; 1908, Sitzb. Akad. 

 wiss. Wien, 117, p. 667, pi. 1, f. 1; Regan, 1908, Ann. mag. nat. hist., ser. 8, 2, p. 53. 



Body slender, head large, broad, depressed; snout tapering, rounded at the 

 end. Eyes large, nearly as far from the end of the snout as from the first gill 

 opening. Nostrils much nearer to the end of the snout than to the mouth. 

 Spiracles large, less than three diameters behind the edge of the orbit and at a 

 higher level. Mouth broadly curved, with a deep groove and with labial folds 

 at each angle; upper fold less than half the length of the jaw, lower shghtly 

 less than upper. Teeth resembling those of L. foliaceus, that is, all sectorial, 

 those in the middle of the upper jaws having the outhne of an isosceles triangle 

 and being nearly erect, but becoming more oblique laterally, and those on the 

 lower jaws much more obhque and nearly twice as broad. Width of gill open- 

 ings less than half the length of the orbit, in front of the pectoral. Pec- 



