28G Mr. G. A. Boulenger on new 



length. Snout shorter than the postocular part of the hea<I, 

 as long as the diameter of tlie eye, which is 'i^^ to 3^ times in the 

 length of tlie head and 1^ tol^ in theinterorbital width; adipose 

 eyelid moderately developed in front and behind. Belly rounded 

 before and behind the ventrals. Dorsal II 10, a little nearer 

 root of caudal than end of snout, its longest ray % to f the 

 length of the head. Anal II 8. Pectoral § lengtli of head ; 

 ventral below middle of dorsal. (Caudal forked. Caudal 

 peduncle a little longer than deep. Scales cycloid, 43-44 

 1^^, 6 between the lateral line and the base of the ventral. 

 Brownish above, white beneath ; a black band along the 

 lateral line, extending on the middle rays of the caudal ; tins 

 unspotted. 



Total length 60 millim. 



Several specimens from the Rio Coxipo, Matto Grosso. 



Stands nearest to C. elegans, Stdr., but has more scales in 

 a vertical series. 



Bunocephalus Dorice. 



Depth of head twice in its width, which is a little greater 

 than its length ; upper jaw not projecting ; cranial ridges 

 feebly prominent ; interorbital space concave, half the width 

 of the corresponding part of the head ; maxillary barbel much 

 longer than the head, extending nearly to tiic middle of the 

 pectoral spine, posterior mandibular barbel only half as long 

 and about once and a half the length of the anterior. Pec- 

 toral spine slightly curved, with strong serrje on the outer 

 border, reaching the base of the ventral fin in the male, not 

 so far in the female. Coracoid processes parallel, as long as 

 their distance from each other, extending to the posterior 

 third of the pectoral spine. Dorsal fin with /5 rays, equally 

 distant from the end of the snout and the root of the caudal, 

 or a little nearer the latter ; first ray | the length of the head. 

 Anal with 7 rays. Caudal peduncle compressed posteriorly, 

 its length 4^ to 5^ times in the total. Skin granular, with 

 larger tubercles forming longitudinal series on the caudal 

 region. Dark brown above, with three blackish cross-bands, 

 the first through the base of the dorsal fin, the two others on 

 the caudal peduncle; dorsal fin black, whitish at the end; 

 caudal black, whitish at the base and edged with white. 



Total length 83 millim. 



Five specimens from Villa Rica, Paraguay, and one from 

 Posadas, Rio Parana. 



This new species, which I have the privilege of naming 

 in honour of the eminent Director of the Genoa Civic Museum, 



