430 MEMOIRS OF THE CARNEGIE MUSEUM 



Twelve specimens, 125-150 mm. Crab Falls. (C. M. Cat. No. 1806a-d; 

 I. U. Cat. No. 12603.) 



Head 8.25-9, depth 6.6-7.5 in the length to the end of the anal; anal rays 

 170-194 ; 69 snout 3.2-3.4, interorbital about 3.3 in the head; eye equal to or a little 

 greater than either the snout or the interorbital and 3 or a little less in the head. 



Body and head compressed; width of the head 2.25-2.5, depth of the head in 

 the occipital region 1.6-1.8 in the greatest depth; anus on or slightly in front of 

 the vertical from the posterior margin of the eye; dorsal profile almost straight; 

 ventral profile of the head sloping caudad, at an angle of forty-five degrees; the 

 body tapering; snout short and pointed; mouth very narrow; gape quite short; 

 upper jaw overlapping lower; teeth present in both jaws; eyes large, greater than 

 maxillary. 



Caudal peduncle narrow, ribbon-like, equal to about half the total length 

 without the head; pectorals about twice the eye; origin of the anal slightly behind 

 the base of the pectorals, on a vertical from a point about the length of the snout 

 behind the head. 



Ground-color varying from a pale yellowish brown to almost yellow; origin 

 of the anal rays, the scales of the lateral line, and most of the dorsal scales more or 

 less outlined with black; a narrow median dorsal streak of dark brown or black; 

 top of head bluish black ; fins hyaline. 



Reported only from British Guiana. 



274. Eigenmannia virescens (Valenciennes). 



Sternarchus virescens Valenciennes, in d'Orbigny, Voy. Am. Mer., V, ii, 1847, 11, 

 pi. 13, fig. 2. 



Sternopygus virescens Muller and Troschel, in Schomburgk, Reisen, III, 1848, 

 640 (Lake Amucu forest streams). — Kaup, Cat. Apod. Fish, 1856, 137. — ■ 

 Gunther, Catalogue, VIII, 1870, 7 (Surinam). 



Cryptops virescens Eigenmann, Ann. N. Y. Acad. Sci., VII, 1894, 626. 



Eigenmannia virescens Eigenmann and Norris, Rev. Mus. Paulista, IV, 1901, 549. 

 —Eigenmann and Ward, Proc. Wash. Acad. Sci., VII, 1905, 173. — Eigen- 

 mann, Repts. Princeton Univ. Exp. Patagonia, III, 1910, 449. 



Sternopygus tumifrons Muller and Troschel, Horse Ichth., Ill, 1849, 14. 



Sternopygus lineatus Muller and Troschel, in Schomburgk, Reisen, III, 1848, 

 640 (small forest brooks); Horse Ichth., Ill, 1849, 14 (Lake Amucu in British 



69 Roekstone, 

 Tumatumari, 



