Eigenmann : Ni« Characins in Carkegu Ml -mm. 1,7 



otherwise regularly imbricate. Origin ol dorsal equidistant from 

 snout and tip of adipose or base of ventrals; ventrals rea< hing anal; 

 pectorals beyond base of ventrals. A faint humeral band; no caudal 

 markings; a series of Mack, inverted, comma-like dashes above a 

 black line along the middle of the body. These markings all faint. 

 ( 1iim'1\ allied to guianensis. 



15. Astyanax paranahybae sp. nov. 

 Plate VIII, Sg. 1. 



Type. On > . 54 mm. C. M. No. ^.?5<j- Rio Paranahyba, Aug., 1908. 



Mead 4; depth 3.6; D. 10; A. 22; scales 6-38-4 (5 to anal); eye 3 

 in the head. .75 in the interorbital. Elongate, little compressed or 

 elevated; greatest depth at origin of dorsal; preventral area flattened, 

 with a median series of scales in front; isthmus heart-shaped, abruptly 

 constricted behind, a groove at the constriction; post-ventral area 

 rounded; predorsal area with about fourteen scales, in a median series; 

 occipital process very short, about one-ninth of the space between its 

 base and the dorsal, bordered by two scales on each side; interorbital 

 tlat 1 i-li. second suborbital little more than half the width of the cheek; 

 snout blunt; maxillary slender, 4 in the head, not reaching to below 

 the eye; premaxillary without any antero-posterior extent. Three 

 teeth in the outer row of the premaxillary, live in the inner row; 

 maxillary with three or four teeth; mandibular teeth seven, graduated; 

 all the teeth tricuspid. Gill-rakers minute. Scales regularly imbri- 

 cate, no interpolated scales; caudal naked, anal sheath along the 

 bases of the anterior rays of a single scries of scales. Lateral line but 

 slightly decurved. Origin of dorsal equidistant from tip of snout and 

 caudal. Ventrals not reaching anal, pectorals joined to ventrals. 

 Straw-color in alcohol; a faint silvery band; no caudal spot; a faint 

 humeral spot crossing the fifth scale of the lateral line. 



16. Astyanax nbeirae sp. nov. 

 Plate VIII, fig. 2. 



Type. — One specimen, 66 mm. C. M. No. 3368. Xiririca, Dee. 5, 1908. 



Cotypes. — Fifty-six specimens, 26 to 82 mm. C. M. No. 3369. Morretes, 

 Jan. 3, 1909. 



Cotypes. — Twenty-seven specimens, 26 to 50 mm. C. M. No. 3370. Iporanga, 

 Dec. 1, 1908. 



Cntypes. — Eight specimens, 15 to 73 mm. C. M. No. 3371. Xiririca, Dec. 5, 

 1908. 



