60 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



equal to snout length or ventral base length. Claspers reach anal 

 origin. 



Slate gray, smooth skin at pectoral bases, etc., blackish brown. 

 Pupil pale translucent green. Length, 810 mm. (Barnard.) 



Off South Africa. 



Subgenus Apristurus Garman 



Nasal valves each with anterior and posterior nasal cirrus. First 

 dorsal inserted before midlength, smaller than second dorsal. 



PENTANCHUS INDICUS (Brauer) 



ScylUorhinus indicus Brauer, Deutsch. Tiefsee Exped. Valdivia, vol. 5, Tief- 

 see-fische, p. 8, pi. 14, fig. 1, 1903 (type locality: Lat. 2°5S'8" N., long. 47°6'1" 

 E., in 1,289 meters, off East Africa; lat. 13°1' N., long. 47°10'19" E., in 

 1,840 meters, Gulf of Aden). — Lloyd, Mem. Indian Mus., vol. 2, p. 1139, 

 1909 (Gulf of Oman). 



Scyliorhinus indicus Regan, Ann. Mag. Nat. Hist., ser. 8, vol. 1, p. 459, 1908 

 (copied). 



Apristurus indicus Garman, Mem. Mas. Comp. Zool., vol. 36, p. 87, 1913 

 (compiled). 



Depth 514 to subcaudal origin; head 3, width l^o (as measured to 

 last gill opening) . Snout 1% (head measured to first gill opening) , 

 spatulate, broadly rounded in front; eye 714, 4 in snout, given as l%o 

 in interorbital though figure appears to show little over 2; labial 

 fold halfway in jaw; teeth moderately large, 5 pointed with lateral 

 points smaller than median; internasal equals orbit, space between 

 hind nasal edge and mouth 14 orbit ; cirrus on anterior and posterior 

 nasal flap. Last 2 gill openings above pectoral base. Spiracle close 

 behind eye edge, lower edge apparently little lower than lower eye 

 edge. 



Scales tricuspid. 



First dorsal inserted little before midlength (on figure), length 

 of front edge 214 in head; second dorsal inserted above middle of 

 anal base, front edge 1% ; anal length 1% ; caudal 2i/8 in rest of body, 

 subcaudal little lower than anal, notched little before last fourth; 

 pectoral 1% in head, width I/2 its length ; ventral 1% in head. 



Brownish black. Eye greenish. Length, 132 to 336 mm. 

 (Brauer.) 



Indian Ocean off East Africa and Gulf of Aden. 



PENTANCHUS SIBOGAE (Weber) 



Scyliorhinus sibogae Weber, Siboga Exped., Fisclie, vol. 57, p. 595, 1913 (type 



locality: Makassar Straits, in 655 meters). 

 Apristurus sibogae Fowlee, Proc. 4th (1929) Pacific Sci. Congr., Java, p. 485, 



1930 (reference). 



Depth 11 in total length; head (measured to last gill opening) 

 4% 03 depressed, width V/iq. Snout 2 in head (measured to last gill 



