eigenmann: the cheirodontin^. 



33 



rays of the male with a few hooks; ventrals reaching to or nearly to the anal; 

 pectorals not reaching to ventrals. 



Seven or eight scales with pores; scales firm, mostly with two slightly di- 

 vergent radial striae; caudal naked, the scales extending but Uttle on the base of 

 the lobes, the last scale on each lobe large; anal naked. 



No humeral or caudal spots; back thickly dusted; dorsal dusted like the back; 

 quite black in the male, especially along its base and posterior part; margin of 

 caudal dusky; margin of anal forward to the lobe black or dusky, a narrow dusky 

 band extending obliquely across the lobe to the basal third; opercle with a few 

 chromatophores, largest near its anterior margin; the color everywhere more 

 intense in the male. The color of the anal is evidently much like that of A. agassizi. 



Closely allied to A. anisitsi, the mouth still smaller. 



11. Aphyocharax paraguayensis sp. nov. (Plate II, fig. 2.) 

 6906a, C. M. Type, 25 mm. 6907, C. M., paratype, 20 mm. Rio Paraguay, 



Caceres, May 24, 1909. Haseman. 

 Head 4; depth 3.5-3.8; D. 10 or 11; A. 22; scales 5 + 29; eye about three 

 in the head, a trifle less than interorbital. 



Elongate, dorsal and ventral profiles alike; preventral area rounded, without 

 a distinct median series of scales, about fourteen rows; predorsal area rounded, 



Fig. 10. Dentition of Aphyocharax paraguayensis Eigenmann. 6906, C. M. 



with a perfect median series of thirteen scales; occipital process nearly equilateral, 

 reaching about one-seventh to the dorsal, bordered by one and one-half scales; 

 frontal fontanel reaching to near anterior margin of eye, but httle, if any, shorter 

 than the parietal without the groove; third suborbital in contact with the pre- 



