EIGENMANN: THE FRESHWATER FISHES OF BRITISH GUIANA 323 



Head 3.8: depth 1.75; D. 11; A. 34; scales 7.5-35-7; eye .4 in snout, 2.5 

 in head, 1 in interorbital. 



Deep and much compressed. For the description read that of Foivlerina 

 orbicularis. 



Dorsal not reaching to adipose; anal but little cmarginate, the highest ray 

 reaching the seventeenth ray. 



177. Mcenkhausia grandisquamis (Midler and Troschel). (Plate XLVII, fig. 2.) 

 Tetragonopterus grandisquamis Muller and Troschel, Horae Ichth., I, 1845. 27, 



pi. 8, fig. 2 (Surinam). — Gunther, Catalogue V, 1864, 328 (British Guiana). 



-Ulrey, Ann. N. Y. Acad. Sci., VIII, 1895, 281. 

 Mcenkhausia grandisquamis Eigenmann, Repts Princeton Univ. Exp. Patagonia, 



III, 1910, 437. 



Fifty-one specimens, 45-79 mm. Bartica. (C. M. Gat. Xo. 1348a-,;; I. U. 

 Cat. No. 11857.) 



Sixty-six specimens, 51-86 mm. Rockstone. (C. M. Cat. No. 1349a-/; I. U. 

 Cat. No. 11858.) 



Thirty-five specimens, 50-115 mm. Crab Falls. (C. M. Cat. No. 1350a-i; 

 I. U. Cat. No. 11859.) 



Eight specimens, 64-110 mm. Tumatumari. (C. M. Cat. No. 1351a-c; I. U- 

 Cat, No. 11860.) 



One specimen, 122 mm. Kangaruma. (C. M. Cat, No. 1352a.) 



One specimen, 55 mm. Wismar. (C. M. Cat. No. 1353a.) 



This species is also abundant in the Amazon basin. 



Head 3.5-4; depth usually 2 in the adult; D. 10 or 11; A. usually 26-28; 

 scales 5-35-4; eye 2.33-2.5 in head; interorbital equal to eye, or but a trifle larger. 



A round humeral spot over the third to fifth scales of the lateral line, dis- 

 appearing with age; no caudal spot in adult; sometimes a dusky area at end of 

 caudal peduncle in young; a distinct silvery lateral band, the width of the free 

 margin of a row of scales; fins all plain, mostly hyaline; sides silvery, highly 

 iridescent, 



178. Mcenkhausia chrysargyrea Gunther. 

 Tetragonopterus chrysargyreus Gunther, Catalogue, V, 1864, 328 (Essequibo).— 



Eigenmann and Eigenmann, Proc. U. S. Nat. Mus., XIV, 1891, 53. — Ulrey, 



Ann. N. Y. Acad. Sci., VIII, 1895, 281. 

 Mcenkhausia chrysargyrea Eigenmann, Repts. Princeton Univ. Exp. Patagonia, 



III, 1910, 437 (Tabatinga; Teffe; Jutahy; Jose Fernandez). 



