82 



MEMOIRS OF THE CARNEGIE MUSEUM. 



half to two-thirds of the postorbital area. Gill-rakers 7 + 13, the longest about 

 one-third as long as eye. 



Origin of the dorsal very little nearer tip of snout than to middle caudal rays, 

 the highest ray a little greater than the head; adipose fin well developed; origin 

 of anal below the posterior part of dorsal. Ventrals not reaching anal, the pectorals 

 about to the origin of the ventrals. 



Scales thin, regularly imbricate, with few diverging radial strife. Caudal 

 naked; anal with a few scales in a single series along base of anterior rays. 



Interhaemal spines of the caudal peduncle feeble, about eight to ten in number. 



A faint caudal spot, not directly continued forward as a dark band; upper 

 part of the anterior dorsal rays dark. A silvery lateral stripe. 



The three specimens here described appear to be females. They are probably 

 from an area in which the color-cells do not reach their fullest pigmentation. The 

 species distinctly differs from C. stenodon in the character of the teeth. 



45. Cheirodon stenodon, sp. nov. (Plate XIV, fig. 2.) 

 6848a, C. M., type, 33 mm., 6849a-x, C. M., paratypes, over thirty, largest 34 



mm. Bebedouro, near Rio Grande and Rio Parana. Sept. 1-5, 1908. 



Haseman. 

 A long-jawed, small-toothed, slender species, with feeble interhsemals. 



^(^0 



Fig. 30. Cheirodon stenodon Eigenmann. a, b, c, premaxillary, maxillary, and mandible; d, dentition; 

 e-f, symphyseal line. 



Head 4; depth a little more than 3; D. 10; A. usually 20 or 21, rarely 18, 19, 

 or 22; scales in a median series 36 or 37, rarely 32; six to eleven scales with pores; 

 eight to ten scales between dorsal and ventrals; eye 2.75 in head, equal to the inter- 

 orbital; depth of caudal peduncle about 1.33 in its length. 



