318 MEMOIRS OF THE CARNEGIE MUSEUM. 



last pectoral ray; maxillary barbels extending to the base of the last pectoral ray 

 or a little beyond; pectoral broad, rounded, the filament equal or nearly equal to 

 I he length of the head; origin of the ventrals very little nearer base of middle caudal 

 rays than eye, their tips reaching the vent or very little beyond it; origin of anal 

 under the penultimate dorsal ray [anal entirely behind the dorsal], the distance 

 I tetween its last ray and the middle caudal ray four and one half to five in the length ; 

 caudal rounded, about six in the length; accessory caudal rays not conspicuous; 

 origin of dorsal over the anterior two-thirds of the ventrals; origin of dorsal nearly 

 equidistant from tip of snout and tip of caudal, its distance from the base of the 

 middle caudal rays on an average 1.4 in its distance from the tip of the snout. 



Sides and back in the largest with numerous irregularly arranged spots about 

 the size of the eye, the spots larger and less numerous in the young, much as in 

 P. bogotense. 



In the specimens from La Raya, Santander, the dorsal and ventrals are a little 

 farther back, the ventrals equidistant from base of middle caudal rays and tip of 

 opercular spines, the distance between the dorsal and the middle caudal rays 1.52 

 in its distance from the snout. The anal is entirely behind the dorsal. The origin 

 of the dorsal is equidistant from the eye and the tip of the caudal. Plain or but 

 faintly spotted. 



Specimens from Capitanejo resemble those from La Raya. 



Some of the specimens from Cobarachior seem to be typical bogotense, while 

 others approach the specimens from La Raya and P. latistriatum from Pinchote. 

 P. bogotense, typical of the plains of Bogota, grades into P. nigromaculatum of 

 Santa Marta in Santander and Santa Marta. 



36. Pygidium banneaui Eigenmann. (Plate XLVTII, fig. 1.) 

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

 issued Dec. 23, 1912, p. 19. 

 Habitat.- Streams near Honda, Colombia. 

 1815, C. M., type; 4816a-e, C. M., 12677, I. U. M., paratypes, eighty-nine speci- 

 mens, the largest 44 mm. Bernal Creek, near Honda. Eigenmann. 

 7456a -b, C. M.; 13844, I. U. M., four, 35-41 mm. Guaduas? Gonzales. 



These specimens might lie considered the young of some of the other species if it 

 were not for the fact that one specimen, 34 mm. long, contains eggs over a milli- 

 meter in diameter, which must be nearly mature. 



Head 5.33-5.5; depth 5.5-7; D. 10.5 or 11.5; A. 7.5 or 8.5; P. 8; eyes slightly 

 in advance of the middle of the head; interocular three and five-tenths in the length 

 of the head; teeth conical. 



