30 



MEMOIRS OF THE CARNEGIE MUSEUM. 



6 to 9 with pores; eye 2.75-3.33 in the head, .5-.75 in the snout; interorbital 2.4 

 in the length of the head; interorbital a very little greater than eye. 



About thirteen preventral scales, an equal number of predorsal scales; maxillary- 

 premaxillary border three times in the head, maxillary about two-thirds as long as the 

 eye. Premaxillary with six to eight teeth; maxillary with two to four, mandible 

 with nine to ten; mouth small, the maxillary scarcely reaching to eye; pectorals 

 reaching ventrals; origin of dorsal nearer caudal than to tip of snout. 



Anal and caudal sometimes margined with dark; chromatophores on the 

 dorsal rays; outer pectoral ray sometimes dark; no humeral spot. 



Anal in the male with four, rarely more, hooks on all the rays but the first 



Fig. 7. Aphjocharax anisitsi Eigenmann. a, side of head; h, c, d, premaxillary, maxillary, and portion 

 of mandible of a specimen, 10029, I. U. M. 28 mm. to base of caudal. 



two and the last, the hooks strongest on the posterior rays and on the middle third 

 of the rays. 



While quite similar in general appearance to dentatus, this species differs in 

 many ways. It is smaller, deeper, has fewer scales, much fewer maxillary teeth, 

 a smaller mouth and different color. The anal in the male with hooks on practically 

 all the developed rays, is quite different from that of A. dentatus, which has hooks 

 on only the rays of the lobe. 



9. Aphyocharax avary Fowler. 

 ApJiyocharax avary Fowler, Proc. Acad. Nat. Sci., Phila., 1913, p. 532. 



Known only from the type, 54 mm. long, from the Madeira River about two 

 hundred miles east of Long. 62° 20', Brazil. 



Head 3.87; depth 4.25; D. 13; A. 17; scales forty-two, of which eleven are 



