NO. 1482. 



A RGENTINA FISHES— EVERM A NN A ND KENDA LL. 



83 



Body comparatively deep; dorsal outline more strongly arched than 

 ventral, beginnino- rather abruptly at occiput; greatest depth in a line 

 beginning- immediately in front of dorsal; dorsal high, about equal to 

 length of head, somewhat behind line of insertion of ventral; pectoral 

 reaching ventral, ventral to vent. 



Color, after preservation in formalin, then in alcohol, straw with 

 silver}^ luster, with dusky punctulations on edges of scales above lat- 

 eral line, especially pronounced on back; a diffuse silvery lateral 

 stripe; a faint dusky shoulder spot, none on caudal peduncle; mem- 

 branes of dorsal and anal and sometimes caudal finely punctulated 

 with dusky, making the fins dusky when depressed. 



Proportional meamiremmts of Astyanax iheringii. 



« Two adipose dorsals. 

 21. ASTYANAX EIGENMANNI Evermann and Kendall, new species. 



Head 4.2 in length without caudal; depth 3.15; eye 3 in head; snout 

 4.28; interorbital 2.72; D. 8; A. 17; scales 6-39-4. General form 



Fig. 1.— AsTYANAX eigenmanni. (From the type.) 



somewhat oblong-elliptical; dorsal and ventral curves similar, the dorsal 

 slightly concave at occiput; 12 scales along median line of back from 

 occiput to front of dorsal; origin of dorsal considerably behind ver- 

 tical from insertion of ventrals; height of anterior rays of dorsal 

 about 1.15 in head; pectoral reaching base of ventral; ventral scarcely 

 reaching origin of anal; length of anal base about equal to length of 



