290 MEMOIRS OF THE CARNEGIE MUSEUM 



Dorsal nearly uniform. Caudal lobes with an oblique black bar; area between this 

 bar and the basal spot of the middle rays pigmentless, faintly dusky posterior to the 

 black bars. Tips of outer rays of pectoral and ventral and the first rays of the anal 

 swollen, these fins hyaline, except for a few color-cells along the middle of the middle 

 rays. 



147. Characidium blennioides Eigcnmann. (Plate XXXVIII, figs. 3, 4.) 

 Characidium. blennioides Eigenmann, Ann. Carnegie Mus., VI, 1906, 27; Repts. 



Princeton Univ. Exp. Patagonia, III, 1910, 428. 



Type, 52 mm. Erukin. (Carnegie Museum Catalog of Fishes No. 1144.) 



Cotypes, six specimens, 43-52 mm. Erukin. (C. M. Cat. No. 1145a-b;I.U. 

 Cat. No. 11675.) 



Cotype, one specimen, 55 mm. Tukeit. (C. M. Cat. No. 1146a.) 



Cotypes, two specimens, 42-54 mm. Creek above Potaro Landing. (C. M. 

 Cat. No. 1147a; I. U. Cat. No. 11676.) 



Cotypes, five specimens, 43-49 mm. Tumatumari. (C. M. Cat. No. 1148a-6; 

 I. U. Cat. No. 11677.) 



Cotypes, twelve specimens, 33-47 mm. Crab Falls. (C. M. Cat. No. 

 1149a-6; I. U. Cat. No. 11678.) 



Cotypes, thirteen specimens, 31-60 mm. Amatuk. (C. M. Cat. No. 1150a-d; 

 I. U. Cat. No. 11679.) 



Resembling Etheostoma coeruleum. 



Head 3.75-4; depth 4.5-4.75; D. 11; A. 8; scales 4-32 to 34-2 ; seven median 

 scales anterior to the dorsal; eye 1.1 in snout, 3.75 in head; bony interorbital 

 half the diameter of eye. Teeth three-pointed, the middle point longest. 



Pectorals with the tips of the outer rays thickened, reaching ventrals; ventrals 

 to anal; third anal ray reaching fulcra of the caudal, but scarcely beyond the tip 

 of the last ray. Base of dorsal about 1.2 in its distance from the adipose fin, 5.5 

 in the length; third dorsal ray reaching base of the last. 



Adult nearly uniform bluish black, the ventral surface being but little lighter. 

 Margin of adipose and caudal, and outer edges of ventrals and pectorals, white. 

 Dorsal, caudal, anal, and ventrals conspicuously barred with white and black. 

 Pectorals, exclusive of the tips of the outer four rays, bluish black. 



Younger specimens and lighter colored ones show about seven cross-bands and 

 more or less incomplete rows of light spots following the rows of scales. A dark 

 band forward from eye; a narrower one downward. In the youngest specimen 

 from Amatuk the pectoral, like the ventral and anal, has four dark bands. 33 



33 A smaller specimen from this place, 23 mm. long, has a single band on the pectorals and the ventrals. 

 It is crushed and I am not certain of its identification. 



