eigenmann: the cheirodontin^. 



93 



Elongate, well compressed; mouth small, terminal; lips moderate; maxillary 

 not reaching eye; teeth with five to seven points, maxillary with two teeth; sub- 

 orbital completely covering cheek. Origin of dorsal midway between tip of snout 

 and tip of adipose; third dorsal ray prolonged and filamentous, nearly to origin of 

 the adipose; origin of anal behind base of dorsal, third ray longest, thence gradually 



Fig. 34. Odontostilbe drepanon Fowler. (After Fowler, Proc. Acad. Nat. Sci. Phila., 191.3, p. 529.) 



diminishing; pectorals reaching ventrals; origin of ventrals in front of dorsal, first 

 ray produced in a filament, which extends beyond the origin of anal. 



Base of caudal with a dusky blotch a little larger than the eye, not continued 

 to the end of the middle rays. No humeral spot. Fins all pale. 



50. Odontostilbe fugitiva Cope. 

 Odontostilbe fugitiva Cope, Proc. Am. Philos. Soc, 1870, p. 566, fig. (Pebas); 



Eigenmann and Eigenmann, Proc. U. S. Nat. Mus., Vol. XIV, 1891, p. 54; 



Eigenmann, Reports Princeton Univ. Exp. Patagonia, Vol. Ill, 1910, p. 429. 

 Cheirodon fugitiva Ulrey, Ann. N. Y. Acad. Sci., Vol. VIII, 1895, p. 290. (Lower 



Amazon.) 



Range: Amazon basin. 



6863a-d, C. M., four, largest 41 mm. San Antonio de Rio Madeira. Nov. 3, 

 1909. Haseman. 



Head 4.5; depth 3.25-3; D. 11; A. 22 or 23; scales 37. Eye 2.75-3 in the 

 head, .6 in snout, equals interorbital; depth of caudal peduncle 3 in the depth, 

 1.4 in its own length. Gill-rakers 7 + 12. 



