438 MEMOIRS OF THE CARNEGIE MUSEUM 



(Essequibo). 71 — Kaup, Cat. Apod. Fish, 1856, 127. — Gunther, Catalogue, 



VIII, 1870, 4 (British Guiana). 

 Sternarchorhynchus oxyrhynchus Eigenmann and Eigenmann, Proc. U. S. Nat. 



Mus., XIV, 1891, 62.— Eigenmann and Ward, Proc. Wash. Acad. Sci., VII, 



1905, 167. — Eigenmann, Repts. Princeton Univ. Exp. Patagonia, III, 1910, 



446. 

 Sternarchorhynchus mulleri Castelnau, Anim. Am. Sud, Poiss., 1855, 95. 



One specimen, 185 mm. Warraputa. (C. M. Cat. No. 1807a.) 



Four specimens, 165-240 mm. Amatuk. (C. M. Cat. No. 1808a; I. U. 

 Cat. No. 12590.) 



Head 4.8-5.1, depth 9.6-9.8 in the length to the end of the anal; A. 168-180." 

 Snout 1.6-1.8, interorbital 13 or 14 in the head; eye equal to the interorbital, 8.5-9 

 in the snout, 13-14 in the head. 



Body and head compressed; width of head 2.75-3, depth of head in occipital 

 region 1.25-1.4 in the greatest depth of the body; anus on or a little in front of the 

 vertical from the eye; dorsal and ventral profiles, without the head, almost straight. 



Snout long, tubular, decurved, of small diameter and tapering; mouth small, 

 terminal; gape 1.5-2 in the eye; lower jaw included on the sides, though slightly 

 projecting in front; teeth minute, conical, in two irregular median patches in upper 

 jaw and two irregular series in lower jaw; eyes quite small; mucous pores abundant 

 on head. 



Caudal small, fan-shaped, terminal, two and one-half times the eye; pectorals 

 about 2.75 in the head; origin of the anal about three times the eye behind the 

 vertical from the eye. 



Ground-color a uniform bistre brown to dark brown; head and dorsal parts 

 darker; lateral line hyaline; fins hyaline, rays faintly outlined with dark brown. 



Specimens from the Amazon, in size between these and M tiller and Troschel's 

 type, show intermediate measurements, and A. 192, 194, 197. 



Sternarchus Bloch and Schneider. 

 Sternarchus Bloch and Schneider, Syst. Ichth., 1801, 497, pi. 94 (albifrons). 

 Type, Gymnotus albifrons Linnaeus. 



71 1 have examined the type in the Berlin Museum, 470 mm. No. 4080, Guiana, Schomburgk. Head 

 6.9 in the length to the end of the anal; depth 11 in the length to the anal; A. 216; interorbital 18 in the head; 

 width of head nearly 4 in the greatest depth; depth of head 1.9 in the greatest depth: anus in front of the vertical 

 from the anterior margin of the eye; gape at least as long as the eye; teeth of both jaws large, recurved, in a 

 single series on the sides, in an irregular double series toward the front. 



"Amatuk, 168, 168, 170, 174. Warraputa, 180. 



