268 PROCEEDINGS OF THE ACADEMY OF [Apr., 



and postorbital region whitish, marked with several pale dusky 

 spots. Following course of 1. 1. its entire extent dusky lengthwise 

 streak, well defined and separated from color of back by whitish or 

 pale parallel and similar streak. Also another parallel and similar 

 pale streak below until over anal medianly, after which it merges in 

 general pale lower tint. From pectoral axilla dusky streak extends 

 back to anal, fading out behind. Now all dusky lengthwise streaks, 

 .and dark color of back variegated with irregular blotches of dusky, 

 anterior to ventral fins. Fins all with grayish-white general color. 

 Dorsal with a few small dusky spots, and pectorals and ventrals 

 with similar variable spots on their upper surfaces, showing through 

 below, and with their distal portions more or less dusky. Anal 

 shows traces of few pale dusky spots on distal portions of longest 

 rays. Caudal with broad posterior dusky to blackish edge, each 

 lobe with few rounded dusky spots. Adipose fin with large dusky 

 blotch above. 



Length 195 mm. 



Type, No. 39,343, A. N. S. P. Rupununi River, British Guiana. 

 J. Ogilvie. 



Related to Ageneiosus hrevijilis Valenciennes, though differs appar- 

 ently in the large pectorals and ventrals and black-edged caudal. 

 Cope's Peruvian example, about 200 mm. ? long, in poor condition, 

 shows the damaged pectorals apparently not reaching the ventrals. 



(Named for Mr. J. Ogilvie.) 



PYGIDID^. 

 *" STEGOPHILINiE. 



COBITIGLANIS subgen. nov. 

 Type Ochmacanthus taxisiigma sp. nov. 



Differs from Ochmacanthus Eigenmann in the anal being entirely 

 behind dorsal base and spines of preopercle and opercle in lesser 

 number. 



(A''»,5'cr;9, loach; y^avi^^ catfish; with reference to the superficial 

 resemblance these fishes bear to the loaches of the Old World.) 

 Ochmacanthus taxistigma sp. nov. Fig. lo. 



Head 5^; depth 6|; D. in, 6, i; A. iii, 4, i; P. i, 5, i; V. i, 4, i; 

 head width ly^ its length; head depth at occiput If; snout 3j; 

 ■eye 3; mouth width 1|; interorbital 3|; length of dorsal 1|; of 

 .anal If; of pectoral If; of ventral 2; of lower caudal lobe 1^; least 

 depth caudal peduncle 2\. 



Body elongate, slender, well compressed, belly bulging so that 



