Eigenmann : New Characins in Carnegii Museum. 107 



an inconspicuous sheath al the base of the anterior part. Silvery or 

 plumbeous; an obscure, vertical humeral bar; .1 silvery lateral band; 

 dorsal and margin of caudal and anal, in the two larger specimens, 

 dusky. 



The smallest of the three specimens differs notably. Its teeth 

 have the central lobe longer, il is much deeper, which changes the 

 ratios in general; it is plumbeous and more of the anal is dusk) than 

 in the other specimens. 



Spintherobolus 4 gen. now 

 (Type, Spintherobolus papilliferus sp. now) 



Teeth tricuspid, in a single series on dentary, premaxillary, and 



upper pari of maxillary; no adipose fin; lateral line on one or two scales; 

 caudal naked; anal very short, naked; tactile papillae excessively 

 de\ elo] ied. 



3. Spintherobolus papilliferus sp. now 



Plate V, figs. 1-4. 



Type. — One specimen, 41 mm. C. M. No. 3582. Alto da Serra, Sao Paulo, 

 Aug. 4, 1908. 



Colypes. — Four specimens, 25 to 39 mm. C. M. No. 2583. Same place and 

 date. 



Head 3.33; depth 3; 1). 11 ; A. 12 ; scales 35, 13 between dorsal 

 and ventral; eye 4.3, interorbital 3.5 in the head. Cyprinodontiform; 

 profile sloping rapidly to above the ventrals; caudal peduncle a trifle 

 less than half the greatest depth, length of the peduncle twice its height; 

 predorsal area with thirteen scales; preventral area short, rounded, 

 without a distinct median series of scales; occipital process about 6 

 in the distance from its base to the dorsal; frontal fontanel a very- 

 narrow slit; cheeks entirely naked; the suborbitals very narrow, con- 

 cealed; mouth small, terminal; about six arrow-shaped teeth on the 

 maxillary, seven similar, more distinctly three-lobed teeth on the pre- 

 maxillary ; eight similar teeth and two conical ones in each dentary; 

 lateral line organs excessively developed about the head, each papilla 

 orange. Xo gill-rakers. Origin of dorsal in middle of body, its high- 

 est ray 4.5 in the length; caudal lobes about 4 in the length; anal 

 very short, its origin equidistant from preopercle and caudal; ven- 

 trals reaching to the anal, as long as the base of the latter; pectorals 



* 27r(i>07;po-/36\os = emitting sparks. 



