FISHES OF THE PHILIPPINE ISLANDS AND ADJACENT SEAS 283 



Pristiphorus nudipinnis Castelnau, Proc. Zool. Acclimat. Sue. Victoria, vol. 1, 



p. 220, 1872 (Hobsons Bay). 

 Prist iopJwrus oivenil Gunthek, Cat. Fishes British Mus., vol. 8, p. 432, 1870 



(no locality ) .—FowLEB, Proc. 4th (1929) Pacific Sci. Congr., Java, p. 497, 



1930 (reference). 



Head 3 to subcauclal origin; width 3i/4. Snout II/3 in head, ros- 

 trum armed with 21 + 20 principal denticles, usually 1 and sometimes 

 2 intermediate teeth between larger teeth, with age many as 4; 

 barbel 2% in snout; orbit 101/2 in head, 7 in snout, 1% in interor- 

 bital; teeth in 35 rows in upper jaw, crowns broad, each with strong, 

 narrow, median cusp ; interorbital 6I/2 in head. Gill openings nearly 

 equidistant, last 2 closer. Spiracles about equal orbit. 



Scales minute, crowns with three keels (3 to 7) on forward half, 

 smooth posteriorly; scales absent from marginal portions of dorsals 

 and pectorals. 



First dorsal origin behind depressed pectoral tip length of orbit, 

 fin length 3^^ in head ; second dorsal origin behind depressed ventral 

 length of second dorsal base ; caudal to subcaudal origin 5 in rest of 

 body, subcaudal narrow; pectoral 2% in head, width equals its 

 length ; ventral length 314 in head. 



Brown, lighter beneath. Rostrum longitudinally striped with 

 brown and light. Length, 445 mm. (McCulloch; Garman.) 



Victoria, Tasmania, South Australia. Types of the species and 

 Pristiopho7tis owenii in the British Museum, the largest 1,000 mm. 

 long. 



Genus PLIOTREMA Regan 



PUotrema Rexjan, Ann. Natal Gov. Mus., vol. 1, p. 1, 1906. (Type, PUotrema 

 warreni Regan, monotypic.) 



Rostral teeth serrated behind. Pupil subcircular. Gill openings 

 6 each side. 

 Differs from Prisiiopkoi'us in 6 gill openings. 



PLIOTREMA WARRENI Regan 



PUotrema icarreni Regan, Ann. Natal Gov. Mus., vol. 1, pt. 1, p. 1, pi. 1, 1906 

 (head) [type locality: Natal; False Bay, Cape of Good Hope; p. 24 (Bird 

 Island)] ; Ann. Mag. Nat. Hist., ser. 8, vol. 2, p. 57, 1908 ( type ) .— Gakman, 

 Mem. Mus. Comp. Zool., vol. 36, p. 248, 1913 (Natal; Cape of Good Hope).— 

 GuxHRisT and Thompson, Ann. Durban Mus., vol. 1, p. 284, 1916 (ref- 

 erences). — Gilchrist, Marine Surv. South Africa, Spec. Rep., no. 2, p. 50, 

 1022 (oft" Durban).— Barnard, Ann. South African Mus., vol. 21, pt. 1, 

 p. 53, pi. S, fig. 3, 1925 (False Bay to Natal) .—Fowleb, Proc. Acad. Nat. Sci. 

 Philadelphia, 1925, p. 192 (Natal). 



Depth 9% to subcaudal origin, body with well-developed dermal 

 ridge each side of tail; head 21/2, width 5. Snout 1% in head; eye 

 12, 9% in snout; mouth width 8 in head, little arched, groove at 

 each angle; upper jaw teeth in 40 to 44 rows, lower 31 to 34; rostral 



