296 MEMOIRS OF THE CARNEGIE MUSEUM 



Nat. Mus., XIV, 1891, 50.— Pellegrin, Bull. Alus. d'Hist. Nat., V, 1899, 406 

 (Manaos). — Eigenmann, Repts. Princeton Univ. E.\p. Patagonia, III, 1910, 

 425. 

 Pithecocharax trimaculatus Fowler, Proc. Acad. Nat. Sci. Phila., 1906, 320 (Peru- 

 vian Amazon). 



Two specimens, 116-124 mm. Twoca Pan. (C. M. Cat. No. 1858; I. U. 

 Cat. No. 12145.) 



Three specimens, 67 to about 111 mm. Crab Falls. (C. M. Cat. No. 1859; 

 I. U. Cat. No. 12146.) 



One specimen, 72 mm. Rockstone. (C. M. Cat. No. 1860.) 

 Head 4-4.5; depth 3.7-4; D. 12; A. 10 or 11; scales 5-42 to 44-4.5; eye 3.6 

 in head, 1.25 in snout, 2 in interorbital ; 3.2, 1.2, and 1.25, respectively, in a small 

 specimen. 



Comparatively heavy, the width equal to half the depth; profile sharply 

 depressed from the nape to the snout; snout comparatively^ short, subelliptical in 

 cross-section, the interorbital broad; opercle striate. 



Four teeth on each side of each jaw, the outer tooth of the lower jaw four- 

 pointed, the next three-pointed, the inner bifid; those of the upper jaw all three- 

 pointed. 



Dorsal rounded, its longest ray 5 in the head, its origin nearer tip of adipose 

 than to snout; caudal deeply forked, the upper lobe longest, 3.5 in the length; 

 anal truncate, the tips of all the rays reaching the same point when depressed; 

 ventrals reaching half-way or a little more than half-way to anal; pectorals about 

 half-way to middle of anal. 



Light or dark brown. A large, subcircular, faintly occUated spot on the 

 middle of the sides below the posterior half of the dorsal; a similar, but smaller, 

 spot at the base of the middle caudal rays; sometimes a small spot on the front 

 scales of the lateral line; opercle dark; each scale of the lower part of the sides 

 with a dark spot or streak, the spots forming series; light-colored specimens with 

 five dark wavy lines across the back in front of the dorsal, and about ten similar ones 

 under and behind the dorsal, becoming broader and diffuse toward the caudal. 

 Fins reddish in life. 



154. Anostomus plicatus sp. nov. (Plate XLI, fig. 3.) 

 Type, 86 mm. Crab Falls. (Carnegie Museum Catalog of Fishes No. 1861.) 

 Cotypes, two specimens, 77-89 mm. Crab Falls. (I. U. Cat. No. 12148.) 

 Cotypes, two specimens, 102-104 mm. Bartica. (C. M. Cat. No. 1862a; I. 

 U. Cat. No. 12149.) 



