ElGENMANN : COLLECTIONS OF FlSHES FROM PARAGUAY. 113 



2. Bunocephalus dorice Boulenger. 



Two specimens from small brooks at Villa Rica (464) ; another 

 from the Laguna Pasito (462). 



3. Dysichthys australe Eigenmann and Ward, sp. nov. ( Plate XXXI. ) 

 Type No. 10123, one specimen, 28 mm. long from Corumba (317). 



Cotypes, No. 10124, ten specimens from Corumba (317). This 

 species may be distinguished from Dysichthys coracoideus, the only 

 other species of the genus, as follows : 



a. First dorsal ray a little nearer tip of snout than base of caudal ; maxillary baibels 

 reaching to base of pectorals. D.I,5 ." coracoideus. 



act. Distance of first dorsal ray from base of caudal one and one half times as great 

 as its distance from tip of snout ; maxillary barbels not reaching to base of 

 pectorals ; D.1,4 australe. 



Body slender, its greatest width at base of pectorals, 3^ in the 

 length ; depth at origin of dorsal 6 in the length ; head depressed ; 

 snout rounded ; two ridges diverging from near the central portion of 

 the snout, running backward above the eye, meeting again to form the 

 nuchal crest, leaving a diamond-shaped depression between the ridges ; 

 nuchal crest continued back to base of dorsal fin ; a crest on each side 

 beginning at the operculum and running parallel with the lateral and 

 nuchal crests ; the ridges and knobs of the head well developed ; 

 interorbital space very concave; the part of crest bounding the orbit 

 especially strong ; a knob before and another behind the eye. The 

 eyes placed almost laterally below the ridges ; eye 1^ in the snout, 7 

 in the head, 3 in the interorbital ; maxillary barbels not reaching to 

 base of pectorals by % of their length. 



Coracoid processes parallel behind, their length 2 in the distance 

 between them. Humeral processes slightly shorter ; skin everywhere 

 covered with very conspicuous papillae, those on the sides of the body 

 arranged in about seven rows ; distance of dorsal fin from tip of snout 

 2^ times in the length ; pectoral spine armed on both sides with long 

 hooks. Dark brown, speckled with lighter ; fins light brown ; belly 

 speckled with white; head 5; depth 6; width 3^; D.1,4; P.I, 

 4 5 V. 6; A. 7; C. 10. 



The only other species of this genus was described by Cope from 

 Nauta on the Marailon about 2,000 miles from the present locality. 



Silurid/e. 

 4. Rhamdia quelen (Quoy and Gaimard), 

 One specimen from Corumba (335). 



