142 MEMOIRS OF THE CARNEGIE MUSEUM. 
in front of, the vertical from the eye; dorsal and ventral profiles behind the head 
almost straight. : 
Snout long, tubular, decurved, of small diameter and tapering; mouth small, 
terminal; gape 1.5 to 2 in the eye; lower jaw included on the sides, slightly pro- 
jecting in front; teeth small to medium, conical, in two irregular median patches 
in upper jaw and two irregular series on lower jaw; eyes quite small; mucous pores 
abundant on the head. 
Caudal small, fan-shaped, terminal, 2.5 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 to dark brown; head and dorsal parts darker; 
lateral line hyaline; fins hyaline, rays faintly outlined with dark brown. 
The type of oxyrhynchus was examined by Dr. C. H. Eigenmann. His notes 
follow. 
“Type in the Berlin Mus. 470 mm. No. 4086, Guiana, Schomburgk. 
“Head 6.9 in the length to the end of the anal; anal 215; interorbital 18 in 
the head. Width of the head near 4 in the greatest depth; depth of the 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.” 
From a comparison of the anal rays, the size and the shape of the head and 
snout it seems that Sternarchorhynchus curvirostris (Boulenger) and Sternarcho- 
rhynchus mormyrus (Steidachner) are synonymous with Sternarchorhynchus 
oxyrhynchus (Miller and Troschel), the variations being in part due to the size of 
the fish. 
X. STERNARCHORHAMPHUS Kigenmann. 
Type, Sternarchus miilleri Steindachner. 
With fontanels; a caudal fin; snout produced, straight; mouth large; size medium 
to large; body very elongate and much compressed; maximum depth in, or just 
behind, the pectoral region; head moderately large to medium, pointed and pro- 
duced; gape rather straight; small conical teeth in both Jaws; eyes small and 
covered by a membrane; scales cycloid; lateral line complete and quite straight; 
anal long, growing narrower caudad; caudal very small. 
14. Sternarchorhamphus miilleri (Steindachner). 
Sternarchus (Rhamphosternarchus) miilleri StTEINDACHNER, Flussf. Stidam., III, 15, 
pl. V, fig. 4, 1881 (Para). 
Sternarchorhynchus miilleri EIGENMANN AND EIGENMANN, Proce. U. 8. Nat. Mus., 
XIV, 1891, 62. 
Sternarchorhamphus miilleri EIGENMANN AND Warp, Proc. Wash. Acad. Sci., VII, 
1905, 166 (Para); von InERING, Os Peixes do Brazil, Part 1 A, 1907; E1cEn- 
MANN, Repts. Princeton Univ. Exp. Patagonia, III, 1910, 449 (Para). 
