258 PROCEEDINGS OP THE ACADEMY OF 



10 ; Y. 8. Pectoral reaching ventrals, A'entrals filamentous, reach- 

 ing anal, commencing in front of dorsal. Dorsal with median 

 rays, and caudal with longest rays filamentous. 



Color, scales orange at base, with broad blackish margins form- 

 ing rows of spots ; dorsal fin with a black spot at middle and a 

 large black saddle below and in front of it on the back ; mandi- 

 ble black-edged; fins orange-red. Total length .0*155 m. ; to 

 dorsal fin .0385 ; to ventrals .027 ; to anal .0416. 



This is the second species of this genus, which was character- 

 ized by the writer, Proceedings Am. Phil. Soc, 1870, p. 563. It 

 differs from the type H. melanostomus, in the larger scales, there 

 being 5 in this, 7 in that, in a cross series. 



CHARACINIDiE. 



CURIMATUS CYPRINOIDES, Linn. 

 Syst. Naturae ; Gliutlier, Cat. B. M. v. 290. 



CURIMATUS RUTILOIDES, Kner. 

 Denkschr. Wien. Acad., 1859,141. Giinth. v. 290. 

 Both these species quite abundant. 



PROCHILODUS INSIGNIS, Kner. 

 Denkschr. Wien. Acad., 1859, 147. Giiutb. v. 290. 



D. 11, A. 10. L. 1. 44, 1. tr. 22. Depth 2.5 times in length ; 

 head three times. Silver-leaden above ; caudal with two black 

 cross-bands forming chevrons with the angle directed distally. 

 Dorsal with three, anal with two dark bands. A single small spe- 

 cimen. 



ANOSTOMUS FASCIATUS, Spix. 



Pise. Braz. t. 36. Giintli., Cut. B. M. v. 304. 



L.a:MOLYTA, Cope, gen. nov. 



Allied to Schizodon (Anostomus) in all respects, i. e. with mova- 

 ble flat incisor teeth in the jaws, but difiering in having the 

 branchiostegal membranes entirely free from the isthmus. They 

 are iniited to each other onl}^, and the connecting membrane 

 brido-es the isthmus throughout its length. In the only species 

 known to me the inferior teeth are truncate with entire margin, 

 or incisor-like ; the superior are crenate. 



[January 16, 



