EIGENMANN: THE PYGIDIID/E, A FAMILY OF SOUTH AMERICAN CATFISHES. 309 



front of the middle; interocular three times in the head; teeth broad incisors, in two 

 series. 



Nasal barbels extending to the tip of the opercular spines or a little further, 

 maxillary barbels usually beyond base of last pectoral rays; pectoral narrow, the 

 filament longer than the head; origin of ventrals equidistant from base of middle 

 caudal rays and some part of the opercular spines, the tips of the ventrals reaching 

 vent; origin of anal under anterior half of the dorsal, the distance between the base 

 of the last anal ray and the base of the middle caudal rays 4.5-5 in the length; 

 caudal rounded, 5 to 6.5 in the length; origin of dorsal about equidistant from tip 

 of caudal and opercle, its distance from the base of the middle caudal rays about two 

 times in its distance from the snout. 



A narrow, dark lateral stripe, a variable number of dark spots, smaller than 

 the eye, above the band and below it on the tail. 



The specimens from Cristalina have the lateral band very broad, the maxillary 

 barbels reaching to the middle of the pectoral. 



25. Pygidium chapmani Eigenmann. (Plate XLVII, figs. 2, 3.) 



Pygidium chapmani Eigenmann, Indiana University Studies, No. 16, dated Sept., 

 issued Dec. 23, 1912, p. 18. (Boquia.) 



4817, C. M., type, 106 mm.; paratypes, 4818a-t, C. M.; 12678, 1. U. M., Boquia. 

 Eigenmann. 



7091a-6, C. M.; 13805, I. U. M., 4, 78-118 mm. Rio Dagua at Caldas. Eigen- 

 mann 



Habitat. — Upper Cauca Valley. 

 Head 5-5.75; D. 10.5; A. 7-8.5; P. 7; interocular 3.5 in the head; eye in middle 



of the head; width of head equal to its length in the young, narrower in the adult. 



Teeth in 75 mm. specimens long and very narrow chisels, in smaller specimens less 



distinctly chisel-shaped, in 65 mm. specimens long and smaller, conical. 



Nasal barbels extending to base or near tip of opercular spines; maxillary barbel 



just beyond origin of pectorals. 



Fig. 13. Pygidium chapmani Eigenmann. Type, 106 mm., C. M. No. 4817, Boquia. 



