NO. 1556. LIST OF CIIARACIN FISHES— EIO ENMANN AND OGLE. 19 



Astyanax cuvieri Lutken. 



No. 41!>61. Rio das Velhas (?), Brazil, Lutken. Two specimens 

 agree with Liitken's (Velhas Flodens Fiske) tig. 13. They are marked 

 eurierl. They differ conspicuously from specimens of rutilus from 

 Para and Rio Grande do Sul. In the largest specimen (19 mm. to 

 base of caudal) we have depth 3.33; head 3.66; A. 29; scales 7-37-5; 

 eye 2.5; maxillary long, equal to length of eye; snout 1; interorbital 

 3.66. Liitken's figure 11 represents a form intermediate between the 

 typical rutilus and the specimens at hand. 



Astyanax ihering-ii Boulenger. 



No. 39132. La Paz, Montevideo, Uruguay, collected ))y W. E. 

 Satiord. 



No. 39117. One specimen, Montevideo, Uruguay, collected by 

 Arechavaleta. 



Astyanax fasciatus Cuvier. 



No. 1889. Museum of Indiana University, Rio Grande do Sul, Bra- 

 zil, a 102 mm. to base of caudal. Depth 2-^; A. 21; eye 3.6, equal 

 to snout; maxillary longer than eye, 3+ in head; bon}' interorbital, 

 •2.66 in head; an oval humeral spot. 



1) 76 mm. to base of caudal. Depth 2.6; A. 21; eye 2.8; snout 1; 

 maxillary a))out length of eye; bony interorbital 2.8 in head. 



e 73 nnu. to base of caudal. Depth 2.66; A. 25; eye 2.8; snout 3i; 

 maxillary not quite as long as eye; bon}^ interorbital 2.8. 



On account of the small eye and wide interorbital the first of these 

 specimens can readily be distinguished from specimens of A. rutilus^ 

 but otherwise, as stated under ^1. rutilus^ there is such an intergrad- 

 ing between the two species that we are very doul>tful whether they 

 are distinct. 



No. 11960 (part). Lagoa Santa, Brazil. Presented l)y Dr. Chr. 

 Lutken. 



These specimens represent Liitken's A. rhularis. They agree very 

 closely with the specimens of ^1. fasciatus from Rio Grande do Sul. 



a 70 mm. to base of caudal. Depth 3.25; head 1; A. 21; e3'e 3.75, 

 equal to snout; interorbital 3 in head; maxillar}^ e(jual to interorbital. 

 Scales 6-33-3i. A second specimen has anal 23; scales 6-36-3. 

 Astyanax rutilus (Jenyns). 



lam not at all sure that rutilus andyasciatus are distinct species. I 

 have numerous specimens from a variety of localities. In the more 

 southern ones and those along the southeast coast of Brazil there are 

 a few in which the number of anal rays is slightly less than in those 

 from the Paraguay River. In depth there is a wide diflerence, ranging 

 from the variety jequitinkonhce^ whose depth is 3 in the length, to 

 specimens from Tiete, in which it is 2.25. In a small specimen. If 

 inches, from Piracicaba, the depth is even 1 in the length. The shoul- 



