156 MEMOIRS OF THE CARNEGIE MUSEUM 



its margin and a wedge near the middle of the posterior rays hyaline; caudal 

 spotted, sometimes a narrow subterminal black band; anal and ventrals spotted; 

 lower surface profusely but faintly spotted. 



Brachyglanis 13 gen. nov. 

 Breviglanis Eigenmann, Repts. Princeton Univ. Exp. Patagonia, III, 1910, 384 



(name only). 



Type, Brachyglanis frenata sp. nov. 



Dorsal and pectoral spines well-developed, pungent; skull covered with a thick 

 layer of muscle; ventrals under posterior half of dorsal; caudal forked, the lobes 

 short and about equal; adipose fin not joined to the caudal; anal short; occipital 

 process very short, the skull with a median ridge to near the eye, the fontanel 

 short; eyes small, not strictly superior, without a free orbital notch; premaxillary 

 patch of teeth without a backward projecting angle. 



Key to the Species of Brachyglanis. 



a. Maxillary barbel in the adult not reaching gill-openings when laid back, to the pectoral in the young; 



a dark streak from anterior nares through eyes to gill-openings; a light streak in front of dorsal. 



frenata. 

 aa. Maxillary barbel extending to below the dorsal. 



b. Color uniform melas. 



bb. A broad quadrate light spot on the back in front of the dorsal phalacra. 



32. Brachyglanis frenata sp. nov. 



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

 384 (name only). 



Type, 49 mm. Amatuk. (Carnegie Museum Catalog of Fishes No. 1670.) 

 Cotypes, two specimens, 41 and 68 mm. Amatuk. (I. U. Cat. No. 12052.) 

 Head 3.5; depth about 5; D. 1,6; A. 7 or 8; eye 2 in the snout, 7.5 in the 

 head, 1.5 in the distance between the ej-es. 



Tail compressed, depth nearly uniform from caudal peduncle to occiput; head 

 tapering to the flat snout; head slightly rounded above, its width equal to its 

 length exclusive of the part in front of the posterior nares, its depth equal to the 

 postorbital part of the head; angle of mouth below front margin of eye; the tubular 

 anterior nares projecting beyond the upper lip; maxillary barbel in the smallest 

 extending to the pectoral spine, not to gill-opening in the largest; inner mental 

 barbels but slightly in advance of the outer. 



Dorsal spine equal to snout and eye or a little less, the dorsal rays of nearly 



13 /Spax^s, short, y\dvis, cat-fish. 



