244 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



ENTOXYCHIRUS HARRISSONI (McCulloch) 



Centrophorus harrissoni McCtjixoch, Biol. Res. Endeavour, vol. 3, pt. 3, p. 99, 

 pi. 14, figs. 1-4, 1915 (type locality: Near Gabo Island, Victoria).— Fowleb, 

 Proc. 4th (1920) Pacific Sci. Congr., Java, p. 495, 1930 (copied).— Whitley, 

 Mem. Queensland Mus., vol. 10, pt. 4, p. 200, 1934 (reference). 



Depth 6^2 to subcaudal origin; head 33^, width 1%. Snout 2% 

 in head ; orbit 3%, 1% in snout, 2 in interorbital ; mouth width 21/3, 

 slightly arched, with deep groove and short labial folds at each 

 angle; oblique lateral groove extends behind vertical of spiracle, 

 equals % or % of mouth width; upper teeth much smaller than 

 lower, near symphysis little oblique, others more oblique and some- 

 what larger toward sides, lateral cutting edge almost horizontal; 

 lower teeth with cutting edge nearly horizontal, imperfectly ser- 

 rated; nostrils slightly nearer orbit than snout tip, front nasal flap 

 with triangular lobe and sometimes secondary lobule, hind nasal 

 edge with narrow skinny lobe, internarial 21/2 in preoral length, 

 which 1% in head; interorbital 21/5, low. Gill openings become 

 closer together posteriorly, last widest. Spiracle large, subtriangu- 

 lar, little behind and well above eye. 



Scales small, sessile, pointed posteriorly, upper surface with sev- 

 eral keels which converge towards point. 



First dorsal origin well behind pectoral base, fin length II/2 in 

 head; second dorsal length 1%, origin well behind ventral base, fin 

 lower than first dorsal; caudal 3 in rest of body, front subcaudal 

 edge 2% in caudal length ; least depth of caudal peduncle 6 in head ; 

 pectoral li^, width 1% its length, inner angle reaches about midway 

 in first dorsal base; ventral length 2 in head. 



Gray above, lighter beneath without darker markings. Length, 

 800 mm. (McCulloch.) 



Victoria. Described from 3 females and 1 male, smallest 760 

 mm., a female selected as type. 



ENTOXYCHIRUS ATROMARGINATUS (Garman) 



Centrophorus atromarginatus Gasman, Mem. Mus. Comp. Zool., vol. 36, p. 200, 

 pi. 13, figs. 1-4, 1913 (type locality: Suruga Gulf, Japan ) .—Fowlee, Proc. 

 4th (1929) Pacific Sci. Congr., Java, p. 495, 1930 (reference). 



Depth 6 to subcaudal origin; head 4, width 1%. Snout 3% in 

 head; orbit 3, little greater than snout, about 1% in interorbital; 

 mouth width 21^ in head, little curved, with long straight groove 

 and labial folds at each angle ; teeth in 42 rows above, 30 rows below, 

 upper of 8 or 10 longitudinal rows trifle smaller and nearly erect, 

 from these becoming oblique; lower teeth larger and cutting edges 

 more nearly horizontal; nostrils about last third in snout length, 

 valve rounded lobe with basal lobule, internarial 2% in preoral 



