FISHES OF THE PHILIPPINE ISLANDS AND ADJACENT SEAS 243 

 ANALYSIS OF SPECIES 



a \ Entoxychibus. Second dorsal spine not shaped as arrowhead terminally. 

 &\ Second dorsal larger than ventrals ; orbit less than snout. 



c\ Second dorsal high as first, fins subequal acus 



cr. Second dorsal % height of first, smaller harrissoni 



b'. Second dorsal smaller than ventrals, both smaller than first dorsal ; orbit 



longer than snout atromarg'inatus 



a'. Atbactophoeus. Second dorsal spine shaped as arrowhead terminally ; orbit 

 longer than snout ; inner pectoral angle extends far back as first dorsal 

 base armatus 



Subgenus Entoxychirus Gill 



ENTOXYCHIRUS ACUS (Garman) 



Centrophoriis acus Gakman, Bull. Mus. Comp. Zool., vol. 46, p. 204, 1906 (type 

 locality: Japan).— Rbjgan, Ann. Mag. Nat. Hist, ser. 8, vol. 2, p. 53, 1908 (ref- 

 erence). — Gaeman, Mem. Mus. Comp. Zool., vol. 38, p. 199, pi. 12, figs. 5-8, 

 1913 (Japan). — Izuka and Matsuuba, Cat. Zool. Spec. Tokyo Mus,, Verte- 

 brata, p. 189, 1920 (Misaki).— Fo%vlek, Proc. 4th (1929) Pacific Sci. Congr., 

 p. 495, 1930 (reference).— Tanaka, Jap. Fish. Life Colours No. 27, 1933. 



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

 head; orbit 3l^, li/io in snout, 1% in interorbital ; mouth width 2i/^ 

 in head, slightly curved, with deep straight groove and short labial 

 fold at each angle ; teeth in 36 rows above, 34 below, upper with tri- 

 angular sharp cusps median erect and lateral oblique; lower with 

 cusps little broader, from symphysis outward directed obliquely to- 

 ward angles of mouth ; nostrils about last third in snout, valves with 

 sharp pointed lobes, internarial 2% in preoral length, which 2 in 

 head; interorbital 2%, rather low. Gill openings large, last largest 

 or % of orbit, before pectorals. Spiracle moderate, semilunate, 

 width % space to orbit or nearly y^ of orbit. 



Scales rough, each with strong median and 2 weaker lateral cusps 

 on hinder edge extended from keels on crown ; on white scales scat- 

 tered over body keels appear more numerous and vanish before reach- 

 ing hinder part of scale. 



First dorsal origin behind pectoral base, or opposite upper or 

 outer pectoral angle, long as head; second dorsal length IVio, high 

 as first dorsal, origin close behind hind basal ventral end ; caudal 3% 

 in rest of body, front subcaudal edge 2 in caudal length ; least depth 

 of caudal peduncle 41/10 in head; pectoral length ly^, width 1% its 

 length, inner angle reaches about opposite first third in first dorsal 

 base ; ventral length 1% in head. 



Dark gray-brown, light below. Lighter in area behind orbit and 

 another in middle of forehead. Length, 819 mm. (Garman.) 



Japan. 



