EIGENMANN: THE PYGIDIID^E, A FAMILY OF SOUTH AMERICAN CATFISHES. 311 



tenths to six and five-tenths in the length; origin of dorsal over tips of ventrals, its 

 distance from the base of the middle caudal rays one and eight-tenths to two in its 

 distance from the snout. 



Teeth in the largest specimen narrow chisels, three rows in the premaxillary and 

 the middle of the mandible. In the young the teeth are more nearly conical. 



Color variable; a dark band from the opercle to the middle caudal rays, some- 

 times in part, or as a whole, replaced by a series of large spots; an irregular series 

 of irregular spots half way between the lateral band and the ventrals and anal, this 

 series more rarely replaced by a band; a band or a series of spots between the lateral 

 band and the mid-dorsal line; a mid-dorsal band; small spots sometimes interspersed 

 among the larger ones. 



27. Pygidium caliense Eigenmann. 22 

 Pygidium caliense Eigenmann, Indiana University Studies, No. 10, p. IS, dated 



Sept., 1912, issued Dec, 1912. 

 4819, C. M., type, 53 mm. Cali. ( '. II. Eigenmann. 



Head 4.88-5.75; D. 10.5 or 11.5; A. 9.5 or 10.5; P. 7; eye about in middle of 

 the head interocular 3.5 4 in the length of the head. 



Fig. 15. Pygidium caliense Eigenmann. Type, 4819, Cam. Mus., 53 mm. Cali. 



Nasal barbels extending to base or end of opercular spines, very little shorter 

 in the type ; maxillary barbel extending to the end of the opercular spines or beyond 

 the origin of the pectorals; pectoral rays about equal to the length of the eye and 

 the post-orbital part of the head, the filament extending for more than half the 

 length of the fin beyond the tip of the divided rays on one side in the largest speci- 

 men, nearly as long as the head, shorter in other specimens; origin of the ventrals 

 equidistant from base of middle caudal rays and base or middle of the pectoral 

 rays, reaching just beyond the vent; origin of the anal about under the middle of 

 the dorsal, the distance between the base of its last ray and the base of the middle 

 caudal ray four and one-third to five in the length; caudal rounded, five and one- 

 half to six and one-half in the Length ; accessory rays large, numerous; origin of dorsal 

 -- The head in the figure is a little l"" short. 



