EIGENMANN— SIXTEEN NEW PYGIDIID^. 695 



eye in the middle of the head; interorbital three in the length of the 

 head; teeth bristle-like in about three series. 



Nasal barbels reaching base of opercular spines or beyond origin 

 of pectorals, maxillary barbels to tip of opercular spines or axil; 

 pecforal filament a little longer or shorter than the length of the 

 head, the rays equal to the length of the head without the snout; 

 origin of ventrals equidistant from the base of the middle caudal 

 rays and a point between the axil and a little in front of the opercle 

 (and the tips of the opercular spines in the type), tips of the ven- 

 trals slightly behind the vent ; origin of the anal behind the vertical 

 from the base of the last dorsal ray or under the posterior half of 

 the dorsal, the distance between the base of the last anal ray and 

 the middle caudal rays 4.5-5 in the length ; accessory caudal rays 

 very large and numerous ; caudal rounded, six and a half in the 

 length ; origin of dorsal over the origin of the ventrals or but 

 sHghtly behind this point, always nearer the eye than the tip of the 

 caudal, sometimes equidistant from tip of snout and tip of caudal, 

 its distance from the base of the middle caudal rays one and a half 

 or less in its distance from the snout. 



Uniform straw-colored in alcohol. 



7. Pygidium dorsotriatum spec. nov. 



7093 C. ; 13810 I., four, 18-76 mm., the largest the type. Villavi- 

 cencio. Manuel Gonzales. 



Distinguished by the eccentric, dark, lateral band. 



Head 5; D. 12.5 (of which 4 minute) ; A. 9.5; P. 9; center of 

 eye very little in advance of middle of the head, interocular three in 

 the head. Teeth conic. 



Nasal barbels extending to or slightly beyond origin of pectoral ; 

 maxillary barbel to the axil, equal to the length of the head ; pectoral 

 filament equal to the length of the head, the longest ray equal to 

 the length of the head behind the nasal filament ; origin of ventrals 

 equidistant from base of middle caudal rays and tip of the inter- 

 opercular spines, ventrals nearly reaching the anal ; origin of the 

 anal under the last quarter of the dorsal, the distance between the 

 base of its last ray and the base of the middle caudal rays about 4.5 



