1911.] NATURAL SCIENCES OF PHILADELPHIA. 427 



caudal base, first branched ray (tip slightly damaged) evidently 

 longest, and not quite depressed posteriori}' far as tip of last ray, fin 

 If to caudal base. Adipose fin inserted about midway between last 

 dorsal ray base and caudal base, fin about 2 to latter. Caudal 

 broad, emarginated behind, lower lobe much larger and stronger, 

 all rays rather osseous. Anal inserted opposite seventh dorsal ray 

 base, rudimentary rays and also first branched, all rather enlarged, 

 osseous and conspicuous, third simple longest with others graduated 

 down about first half of fin, after which all of about uniform height. 

 Pectoral inserted low, pointed, about 1* to anal, or tip at least a little 

 beyond ventral origin in vertical. Ventral inserted a little before 

 dorsal or about midway in vertical between pectoral and anal origins, 

 reaches about 1^ to anal. Vent close before anal, but without abdomi- 

 nal serrae extending along sides. Last abdominal serrature (counted 

 one above) a series of 3 small transverse spines in front of vent. 



Color when fresh in rum with back brilliant steel-blue, more or less 

 dusky and brownish in some lights. Upper surface of head dusky- 

 brown, becoming paler on sides and ruddy-vermilion on lower surface. 

 Lips dusky like top of head. Iris deep brown, tinged with deep red- 

 dish. Teeth shining white. Abdomen brilliant vermilion, fading 

 rosy and paler above and behind. Flanks grayish-brown with irides- 

 cent bluish of more or less paler tints than back, and all this region 

 down to base of anal with inconspicuous deeper ill-defined spots, all 

 of which much more clearly where scales have fallen. These obscure 

 spots all small, mostly rounded, and apparently larger than pupil. 

 A broad jet-black blotch of large size, about equal in extent to entire 

 postero-suborbital area, at beginning of 1. 1. just after gill-opening. 

 Dorsal deep dusky, also caudal largely similar, with rather broad 

 submarginal diffuse brownish or paler area concurrent with much 

 narrower blackish edge along hind emargination. Adipose fin dusky 

 or blackish. Anal largely vermilion, scaly base reddish-brown, and 

 lower edge narrowly dusky. Pectoral and ventral brilliant vermilion, 

 latter with slight dusky tinge distally. Peritoneum whitish. 



Length 5 inches. 



l^-pe No. 37,868, A. N. S. P. La Pedrita, on the Cano Uracoa, 

 Venezuela. February 16th, 1911. F. E. Bond and Stewardson Brown. 



Also No. 37,869, A. N. S. P., paratype, with same data. Head 2f ; 

 depth 1 T V; D. ii, 16, i; A. iii, 27, i; scales in 1. 1. according to tubes 

 77+7; scales in lateral series counted along course of 1. 1. above 

 103 + 12; 40 scales above 1. 1. to dorsal origin; 40 scales below 1. 1. 

 to anal origin; about 40 scales below 1. 1. to ventral origin; about 50 



