FISHES OF THE PHILIPPINE ISLANDS AND ADJACENT SEAS 767 



base; A, 17 or 18; caudal deeply lobate, upper lobe longer or lobes 

 nearly equal; pectoral 1% in head, spine trifle longer than dorsal 

 spine, flattened, outer edge feebly serrate, inner edge strongly ser- 

 rate, rays 10 ; ventral slightly longer than pectoral. 



Blackish to leaden above, passing into whitish below, with bril- 

 liant metallic silver and golden bronze luster, underside of head 

 and belly cream. Fins all blackish on both sides, except dorsal and 

 adipose fin with narrow milk white border. Length, 244 mm. 

 (Herre.) 



Philippines. The type, originally from Manila, was 355 mm. long. 



Subgenus Ariodes Miiller and Troschel 



TACHYSURUS MAGATENSIS (Herre) 



Arius magatensis Herre, Philippine Jouru. Sci., vol. 31, p. 396, pi. 1, fig. 1 

 (dentition), 1926 (type locality: Magat River at Bagabag, Nueva Vizcaya 

 Province; upper Cagayan Valley in Cagayan River) ; Fishes Herre Philip- 

 pine Exped. 1931, p. 22, 1934 (Bayombong). — Roxas and Martin, Dept. 

 Agr. Comm. Manila Tech. Bull. 6, p. 44, 1937 (reference). 



Depth 51/10 to 51/3 ; head 31/3 to 33/5, width 1% to 11/2. Snout 2% 

 to 3 in head, projects, somewhat angulate and pointed centrally; 

 eye 5% to 6%05 1% to 2% in snout, 2I/2 to 3 in interorbital ; maxillary 

 barbel to hind edge of head or pectoral base, mandibular %o long as 

 maxillary, mental about %; upper lip projects, j)artially exposes 

 upper band of teeth, inner margin of lips finely rugose; upper jaw 

 teeth villiform, in narrow arched band, width 4 to 4% its length; 

 lunate lower band longer than upper, widest medially, tapers to point 

 at each end; ovate-elliptical patch of 16 to 26 granular teeth each 

 side of forward outer angle of palate, posteriorly pair of somewhat 

 elliptical larger patches of coarse granular teeth subequal with eye ; 

 plates on top of head granulose, with very long median fontanel not 

 reaching occipital process; last a truncate triangle, basal bone of 

 dorsal spine lunate, narrow, granulose and short; humeral plate tri- 

 angular, surface granular. Gill rakers 6 + 12, equal pupil or little 

 over half of gill filaments. 



Dorsal ly^ to II/4 in head, spine 1% to 1%, moderately strong, 

 sharp pointed granulose anteriorly, smooth behind; adipose fin base 

 134 to 2 in anal base; A. 19 or 20; caudal deeply lobate, upper lobe 

 longest; pectoral i, 11, spine subequal with dorsal spine, both edges 

 variably slightly roughened to finely but strongly serrate, fin, i/4 to 

 IV2 in head; ventral 1% to 2. 



Bluish to dark chocolate brown above, darkest on top of head, 

 sides paler. Reddish plum to whitish or yellowish below, with silver 

 luster all over sides. Cream color or white beneath. Fins chocolate 

 to red brown, caudal palest. Length, 268 mm. (Herre.) 



