150 MEMOIRS OF THE CARNEGIE MUSEUM. 



Acad. Sci., VII, 1905, 163 (Amazons); von Ihering, Os Peixes do Brazil, 

 Part 1 A, 1907; Eigenmann, Repts. Princeton Univ. Exp. Patagonia, III, 

 1910, 448 (Amazons). 

 Sternarchus macrolepis Steindachner, Flussf. Siidam., Ill, 14, pi. V, fig. 7, 1881, 

 near Barra do Rio Negro and Lake Manacapuru; Eigenmann and Eigen- 

 mann, Proc. U. S. Nat. Mus., XIV, 1891, 62; Boulenger, Trans. Zool. Soc, 

 XIV, 427, 1898 (Rio Jm-ua); Eigenmann and Ward, Proc. Wash. Acad. 

 Sci., VII, 1905, 163 (Amazon near Rio Negro and Jurua); von Ihering, Os 

 Peixes do Brazil, Part 1 A, 1907; Eigenmann, Repts. Princeton Univ. Exp. 

 Patagonia, III, 1910, 448 (Amazon, Rio Negro, Guiana). 



3194 C. M., one, 95 mm. Rio Mamore, Sept. 19, 1909, Haseman. 



3195 C. M., one, 160 mm. (estimated, caudal portion gone and partly regen- 

 erated). Santarcm, Dec. 15, 1909, Haseman. 



Fig. 13. Sternarchus bonapartii Castelnau. 



Head 5.75 to 6, greatest depth of the body 8.75 to 9 in the length to the base 

 of the caudal; anal rays 163; a maximum of 8 rows of scales above the lateral line. 



Snout 2.5 to 2.75, interorbital 4.25 to 4.7 in the head, eye 4 to 4.5 in the snout; 

 about 2 in the interorbital, and 11 or 12 in the head. 



Body and head compressed, depth of head in the occipital region about 1.3, 

 width of the head a little more or less than 2 in the greatest depth of the body; 

 anus a very little behind the vertical from the posterior margin of the eye; dorsal 

 profile of the head weakly convex; dorsal part of the body sloping very sHghtly, 

 ventral profile almost straight. 



A comparison of Sternarchus bonapartii and Sternarchus macrolepis Steindach- 

 ner with the above specimens shows macrolepis to be synonomous with bonapartii. 



Distribution: Lower and Middle Amazons and Rio Ucayale. 



XIII. Sternarchella Eigenmann and Ward. 



Sternarchella Eigenmann and Ward, Proc. Wash. Acad. Sci., Vol. VII, 1905, 163. 



Type, Sternarchus schoiti Steindachner. 



Like Sternarchus, the gape short; size rather small to medium; body rather 

 compressed; gape not reaching beyond the posterior nostril; eyes small, covered 



