324 MEMOIRS OF THE CARNEGIE MUSEUM 



Forty-three specimens, 51-61 mm. Rockstone. (C. M. Cat. No. 1370a-,/; 

 I. U. Cat. No. 11841.) 



Seven specimens, 51-91 mm. Crab Falls. (C. M. Cat, No. 1371a-&; I. U. 

 Cat, No. 11842.) 



Fifteen specimens, 53-69 mm. Konawaruk. (C. M. Cat. No. 1372a-e; I. U. 

 Cat. No. 11843.) 



One specimen, 58 mm. Warraputa Cataract, (C. M. Cat. No. 1366a.) 



Twenty-six specimens, 52-101 mm. Packeoo Falls. (C. M. Cat. No. 1373a-e; 

 I. U. Cat. No. 11844.) 



Ten specimens, 60-87 mm. Tumatumari. (C. M. Cat, No. 1374a-c; I. U. 

 Cat. No. 11845.) 



One specimen, 60 mm. Wismar. (C. M. Cat. No. 1375.) 



Two specimens, 58-60 mm. Rupununi Pan. (C. M. Cat. No. 1376; I. U. 

 Cat, No. 11846.) 



Head 3.5-4; depth 2.4 in young, 2 in old; D. 11; A. 27-30; scales 7-33 to 

 34-5. Eye 2.5-2.75 in head; interorbital equal to eye. 



Iridescent silvery. A deep-lying, well-defined, horizontally oval, circular, or 

 rhomboidal, black spot over the space between the fifth to the eighth scale of the 

 lateral line; no caudal spot. 



179. Mcenkhausia browni Eigenmann. (Plate XLVII, fig. 3.) 



"Conia." 

 Mcenkhausia browni Eigenmann, Ann. Carnegie Mus., VI, 1909, 13; Repts. Prince- 

 ton Univ. Exp. Patagonia, III, 1910, 438. 



Type, 66 mm. Aruataima Falls, Potaro River. (Carnegie Museum Catalog 

 of Fishes No. 1004.) 



Cotypes, twenty-five specimens, 46-82 mm. Holmia, Potaro River. (C. M. 

 Cat. No. 1005a-e; I. U. Cat, No. 11711.) 



Cotypes, twelve specimens, 28-68 mm. Two hours below Holmia. (C. M. 

 Cat. No. 1006a-c; I. U. Cat, No. 11712.) 



Cotypes, sixty-nine specimens, 23-80 mm. Savannah Landing, above Kaie- 

 teur. (C. M. Cat. No. I007a-j; I. U. Cat. No. 11713.) 



Cotype, one specimen, 31 mm. Creek below Savannah Landing, above 

 Kaieteur. (C. M. Cat. No. 1008.) 



Cotypes, nine specimens, 30-62 mm. Tukeit, below Kaieteur. (C. M. Cat. 

 No. 1009o-6; I. U. Cat, No. 11714.) 



Cotypes, two specimens, 48-50 mm. Amatuk, Lower Potaro. (C. M. Cat. 

 No. 1010; I. U. Cat, No. 11715.) 



