242 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



DEANIA NATALENSE (Gilchrist) 



Acanthidium naialense Gilchrist, Marine BioL Surv. South Africa, Spec. Rep. 

 No. 2, pt. 3, p. 49, pi. 7, fig. 2, 1922 (type locality: Natal coast iu 160 

 fathoms). — Barnard, Ann. South African Mus., vol. 21, pt. 1, p. 51, pi. 3, 

 fig. 1, 1925 (compiled). 



Depth 7^2 to subcaudal origin ; head 3l^. Snout 2 in head ; eye 4, 

 2 in snout; mouth wide, width 2% in preoral length, groove and 

 labial folds well developed; skin at upper side of mouth angle pli- 

 cated; preoral length 1% in head; nostrils wide, width % distance 

 apart, situated about halfway between snout end and eye, valves 

 narrow ; interorbital low. Gill openings subequal, last 2 closer, about 

 l^ of eye. Spiracle large, length equals space from hind upper eye 

 edge or about half of orbit. 



First dorsal origin close behind pectoral base, fin length 1% in 

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

 caudal 2% in i^est of body, subcaudal 2% its length; least depth of 

 caudal peduncle 6% in head; pectoral l^o, ^vidth 1% its length; 

 which reaches % in first dorsal length ; ventral 2% in head. 



Color not given, apparently uniformly dark. Length not given. 

 (Gilchrist.) 



Natal. 



Genus ENTOXYCHIRUS Gill 



Entoxychirus Giix, Proc. Acad. Nat. Sci. Philadelphia, 1862, pp. 496, 498. (Type 



Squalus uyato Rafinesque, orthotypic.) 

 Entoxychyrus Dumkkil, Hist. Nat. Elasniohr., vol. 1, p. 699, 1865. (Type, Squalus 



uyato Rafinesque.) 

 Atractophorus Gilchrist, Marine Biol. Surv. South Africa, Spec. Rep., No. 2, 



pt. 3, p. 48, 1922. (Type, Atractophorus armatus Gilchrist, monotj-pie. ) 



Body fusiform. Head depressed. Snout blunt. Eyes large, 

 without nictitating membrane, orbits long and with angle at each 

 end. Mouth wide, little arched, deep labial fold at each angle. 

 Teeth unlike in 2 jaws, compressed; upper with triangular cusp, 

 more erect; lower with inner or cutting edge directed outward. 

 Nostrils slightly oblique. Gill openings moderate, before pectorals. 

 Spiracles superior, rather large. Two dorsals, each with laterally 

 longitudinally grooved spine, exposed at top ; first dorsal near pecto- 

 rals; second dorsal behind ventrals. Tail without pits; subcaudal 

 separated by notch from terminal. 



Small bathypelagic sharks. 



Although Whitley Wsts Entoxychirus uyatus (Rafinesque) in Mem. 

 (^iueensland Mus., vol. 10, pt. 4, p. 199, 1934, "The record of this 

 species from Australia may be referable to a Squalu^''\ 



