698 EIGENMANN— SIXTEEN NEW PYGIDIIDyE. 



Nasal barbels reaching about to middle of eye, maxillary barbel 

 to above middle of opercle ; pectoral rounded, very little longer than 

 snout and eye, the first ray not prolonged or with only a trace of a 

 projection ; distance between origin of ventrals and eye a little 

 greater or less than that between origin of ventrals and middle 

 caudal rays ; the ventrals equal to the snout in the length, not nearly 

 reaching vent, nearly half way to anal; origin of anal on or behind 

 the vertical from the base of the last dorsal ray; distance between 

 bases of last anal ray and middle caudal rays five or a little over 

 five in the length ; caudal slightly rounded, seven to seven and a half 

 in the length ; dorsal low and long, the distance between its origin 

 and the base of the middle caudal ray about one and a third in its 

 distance from the snout, its first ray over posterior half of the 

 ventrals. 



Sides and back with numerous spots, smallest over pectorals, 

 largest over anal, rarely coalescent. 



II. Pygidium paolence spec. nov. 



ITrichomycteriis proops Ribeiro, Fauna Brasiliense, IV. {A), igi2, 



p. 221 (Ribeiro de Iguape). 



Habitat, Sao Paulo in the Parana Basin and ( ?) in coastal 

 streams. 

 7081 C, type, 68 mm. Alto da Serra, Rio Tiete, Sao Paulo. July 



25, 1909. Haseman. 

 71 17 C, ten, 25-27 mm. Mog}' das Cruces, Rio Tiete. Haseman, 

 may belong to this species. 



Head 6 ; D. 8.5 ; A. 6.5 not counting hidden rudiments ; P. 6 ; 

 head nearly as wide as long ; eye in anterior half of the head, 

 greater than their distance from the posterior nares ; snout 2.33 in 

 the length of the head, interocular 3.5 ; teeth conic ; nasal barbel 

 reaching base of opercular spines, maxillary barbel reaching tip 

 of opercular spines ; outer pectoral ray with its filament equal to 

 head behind the posterior nares, the filament extending very little 

 beyond the other rays ; ventrals nearly reaching anal, their origin 

 nearer caudal than to tip of pectorals ; caudal rounded, six in the 

 length; origin of anal under middle of dorsal, distance between the 



