392 MEMOIRS OF THE CARNEGIE MUSEUM 



One specimen, 95 mm. Bartica. (C. M. Cat. No. 2223.) 



One specimen, 157 mm. Malali. (C. M. Cat. No. 2222a.) 



One specimen, 325 mm. Tumatumari. (I. U. Cat. No. 11658.) 



Head 3.75; depth 1.28-1.4; D. 26-28; A. 36-44; seme 33-41 + 4-8; scales 



88 with pores. Eye 2.75 in the head, 2 in the interorbital. 



All the specimens so far recorded have the anal falcate. The larger of the 



types in Berlin is but 120 mm. long. 



248. Myloplus asterias (Muller and Troschel). (Plate LVII, fig. 3.) 



Myletes asterias Muller and Troschel, Horse Ichth., I, 1845, 36, pi. 10, fig. 2 

 (Essequibo and Mazaruni); in Schomburgk, Reisen, III, 1848, 638 (Essequibo 

 and Mazaruni near cascades). — Gunther, Catalogue, V, 1864, 373 (Esse- 

 quibo). — Eigenmann and Eigenmann, Proc. U. S. Nat. Mus., XIV, 1891, 

 60. — Boulenger, Trans. Zool. Soc. London, XIV, 1896, 37 (Descalvados). 



Myleus asterias Eigenmann, Repts. Princeton Univ. Exp. Patagonia, III, 1910, 443. 



Myletes ellipticus Gunther, Catalogue, V, 1864, 375 (Essequibo). — Eigenmann 

 and Eigenmann, Proc. U. S. Nat. Mus., XIV, 1891, 61. 



Myleus ellipticus Eigenmann, Repts. Princeton Univ. Exp. Patagonia, III, 1910, 

 443. 

 Two specimens, males, 212-190 mm. Malali. (C. M. Cat. No. 2217a; I. U. 



Cat. No. 11660o.) 



Head 3.66; depth 1.5; D. 27; A. 35-39; seme 44 + 8 double ones and 37 + 



11; eighty-seven to eighty-nine scales with pores, about ten more rows of scales 



than indicated by pores; eye 2.6-2.75 in the head, 1.5-2 in the interorbital, .7 



in the snout. 



For the general characters of this species, see the figure. I have examined the 



type of ellipticus in the British Museum, and a specimen collected by Ehrhardt. 



The type is soft and faded, but the second specimen is in a good state of preservation. 



They are males. 



Two specimens of M . asterias in the British Museum, as well as two (including 



the type) in the Berlin Museum, are females, and have the anal falcate. 



249. Myloplus rhomboidalis (Cuvier). (Plate LVIII, figs. 1-4.) 



Myletes rhomboidalis Cuvier, Mem. Mus. d'Hist. Nat., IV, 1818, 449, pi. 22, fig. 3. 

 —Cuvier and Valenciennes, Hist. Nat. Poiss., XXII, 1848, 210. — Castel- 

 nau, Anim. Am. Sud, Poiss., 1855, 67 (Amazon). — Gunther, Catalogue, V, 

 1864, 373 (Essequibo; Guiana). — Eigenmann and Eigenmann, Proc. U. S. 



