212 THE PLAGIOSTOMIA. 



Jensen, 1899, Vid. med., p. 411, pi. 3; Collett, 1903, Suppl. Norges fiske, 2, p. 19; Regan, 



1908, Ann. mag. nat. hist., ser. 8, 2, p. 52. 

 Machephiltts dumerili Johnson, 1867, Proc. Zool. soc. London, p. 713. 

 Centrophorus dumerilii Gunth., 1870, Cat. fishes Brit, mus., 8, p. 422; Goode & Bean, 1896, Mem. 



M. C. Z., 22, p. 13; Regan, 1908, Ann. mag. nat. hist., ser. 8, 2, p. 52. 

 Centrophorus squamosus var. dumerilii Vaillant, 1888, Travailleur et Talisman, Poissons, p. 69, pi. 3, f. 2. 



Body robust, cavity little more than three fifths of the entire length includ- 

 ing the caudal. Head depressed, tapering. Snout blunt. Nostrils transverse; 

 valve with a short projection. Mouth not greatly arched, farther from the end 

 of the snout than from the first gill opening, with a deep groove and with labial 

 folds at each angle; upper fold longer, not half the length of the jaw. Teeth 

 in 29-35 rows; upper cusps nearly equilateral triangles to sharper, in front 

 erect, laterally more oblique; lower broader, very oblique, the cusp being directed 

 toward the angle of the mouth. Individuals vary in regard to the presence of a 

 median tooth either above or below. Spiracle medium, distant from the eye 

 about half the length of the orbit. Gill openings in front of the pectoral, width 

 less than internarial space. Pectorals small, hardly reaching below origin of 

 dorsal, inner angle slightly produced on large specimens. First dorsal near the 

 bases of the pectorals, length of base about three fifths of the interdorsal space, 

 hind angle produced; spine less than height of fin, less than half exposed. Ori- 

 gin of second dorsal nearly above the axils of the ventrals, base less than half 

 of the space between the dorsals, produced extremity reaching almost to the 

 caudal. Caudal less than one fourth of the total, depth nearly half the length, 

 subcaudal lobe slightly produced. Scales leaf-shaped, on a slender peduncle, 

 with a strong median keel, and with one to two weaker lateral keels at each side, 

 produced behind the edges. The scales on the snout are sessile and have con- 

 vergent keels like those of Centrophorus granulosus. Reaches a length of 5G 

 inches. 



Greyish to greyish brown. 



Specimen in hand from Setubal, 38 inches in length, a mature male. Prof. 

 L. Vaillant. 



Madeira to the North Sea and Iceland. 



Lepidorhinus foliaceus. 



Centrophorus foliaceus Gunth., 1877, Ann. mag. nat. hist., ser. 4, 20, p. 433; 1887, Challenger rept. 



Zool., 22, p. 5, pi. 2, f. A.; Regan, 190S, Ann. mag. nat. hist., ser. S, 2, p. 53. 

 Lepidorhinus (Scymnodon) foliaceus Jord. & Fowler, 1903, Proc. U. S. nat. mus., 26, p. 631. 

 Lepidorhinus foliaceus Smith & Radcliffe, 1912, Proc. U. S. nat. mus., 41, p. 679. 



Body moderate, vent about midway from gill openings to end of tail ; head 

 depressed; snout broadly rounded. Nostrils transverse, at the end of the 



