314 MEMOIRS OF THE CARNEGIE MUSEUM 



Aphyodite 37 gen. no v. 

 Type, the only species, A. grammica. 

 This is an Aphyocharax with a scaled caudal. 



169. Aphyodite grammica sp. nov. (Plate XLIV, fig. 5.) 



Type, about 32 mm. Konawaruk. (Carnegie Museum Catalog of Fishes 

 No. 1882.) 



Cotypes, two specimens, 30-32 mm. Konawaruk. (I. U. Cat. No. 12162.) 



Head 4.5; depth 3.33; D. 11; A. 22; scales 4-7 + 23-3. Eye twice as long 

 as the snout, 2.5 in the head; interorbital a little less than the eye. 



Compressed, slender. Head short, compressed, the snout small, oblique; the 

 maxillary not reaching to below the eye; cheeks small, entirely covered by the 

 suborbital; maxillary margin convex, with three scarcely perceptible teeth; each 

 premaxillary with about ten teeth. 



Scales regularly imbricate, caudal lobes scaled to near their tips. 



Adipose fin well-developed; anal emarginate; ventrals not reaching anal, 

 pectorals not to ventrals. 



Scales of the back margined with dark; a black median line; black at base of 

 ventrals and base of anal. 



Subfamily Iguanodectin,e. 

 Iguanodectes Cope. 

 Iguanodectes Cope, Proc. Acad. Nat. Sci. Phila., 1871, 260, pi. 8, fig. 1. 

 Type, Iguanodectes tenuis Cope. 

 Range: Guianas and Amazons. 



Gill-membranes united, free from the isthmus; upper jaw with two series of 

 pluricuspid incisors, the outer series consisting of a single tooth in each side. Slen- 

 der; anal long; lateral line complete. 

 One species known. 



170. Iguanodectes tenuis Cope. 



Iguanodectes tenuis Cope, Proc. Acad. Nat. Sci. Phila., 1871, 260, pi. 8, fig. 1 

 (Ambyiacu). — Eigenmann and Eigenmann, Proc. U. S. Nat. Mus., XVI, 1891, 

 54. — Eigenmann, Repts. Princeton Univ. Exp. Patagonia, III, 1910, 430. 

 One specimen, 54 mm. Wismar. (C. M. Cat. No. 1884.) 

 Fifteen specimens, 35-92 mm. Rockstone sand-bank. (C. M. Cat. No. 



1885a-d; I. U. Cat, No. 12164.) 



37 6.<p6v, a small fish; She, born of. 



