eigenmann: the FRESHWATER FISHES OF BRITISH GUIANA 157 



equal height, 2 in head; distance from snout to dorsal 2.7 in the length; adipose 

 fin beginning at the tip of the dorsal, its margin rounded, free posteriorly; caudal 

 short and very broad; anal short, rounded, its origin near the vertical from the 

 middle of the adipose; pectoral fin reaching ventral, the spine short, pointed, with 

 recurved hooks on both margins. 



Light brown, spotted and marbled with darker; a clavate light area in front 

 of the dorsal; a dark streak from the anterior nares to the upper angle of the gill- 

 opening; bases of dorsal and caudal opaque, then abruptly hyaline, the margin of 

 the opaque area of the caudal blackish. 



33. Brachyglanis melas sp. nov. (Plate XI, fig. 2.) 



Breviglanis melas Eigenmann, Repts. Princeton Univ. Exp. Patagonia, III, 1910, 

 384 (name only). 



Type, 60 mm. Crab Falls. (Carnegie Museum Catalog of Fishes No. 1672.) 

 Cotypes, nine specimens, 36-53 mm. Crab Falls. (C. M. Cat. No. 1673a-o; 

 I. U. Cat. No. 12053.) 



Cotype, one specimen, 44 mm. Georgetown market. (C. M. Cat. No. 1674a.) 

 Cotypes, two specimens, 32-48 mm. Warraputa. (C. M. Cat. No. 1675a; 

 I. U. Cat. No. 12054.) 



Head 3.8; depth 5.5-8; D. 1,6-9; A. 8, rarely 7. Maxillary barbel extending 

 to below the dorsal; outer mental barbel to base of last pectoral ray or to gill- 

 opening; origin of adipose fin some distance behind the tip of the dorsal, 5-5.5 in 

 the length. Light brown to blue-black; no markings; fins as in frenata. 



34. Brachyglanis phalacra sp. nov. (Plate XII, fig. 1, and Plate XIII, fig. 1.) 



Breviglanis phalacra Eigenmann, Repts. Princeton Univ. Exp. Patagonia, III, 1910, 



384 (name only). 



Type, 81 mm. Amatuk. (Carnegie Museum Catalog of Fishes No. 1671.) 



Very similar to frenata. 



D. 1,8; eye 3 in snout, 11 in head, 2 in distance between the eyes; maxillary 

 barbel reaching to below the middle of the dorsal, outer mental barbel to the gill- 

 opening. 



Light brown, a dark margin to the opaque portion of the caudal; a large quad- 

 rate yellow spot just behind the head, connected with a light bar extending down 

 over the opercle. 



Otherwise as in frenata. 



