THE AMERICAN TETRAGONOPTERINAE. 



305 



As Steindachner has pointed out, the specimens from the Jequitinhonha 

 are certainly slenderer than typical A. fasciatus from the Parana and Rio San 

 Francisco, from which they also differ in the shorter lateral line. 



Depth 2.75-3; D. 11; A. 25-30, most frequently 28; scales 6-34 to 37 

 (usually 36)^ or 5 to the ventrals. 



Gill-rakers 9 + 14, 9 + 13, 6 + 12, 7 + 13, 8 + 14, 8 + 13 in different 

 specimens. 



No interpolated rows of scales. 



Fins hyaUne or dusky ; median caudal rays dark or rarely hyaUne ; tips of 

 first two fully developed anal rays sometimes milky white. 



To this variety should perhaps also be referred : — 



ten specimens 20911, 65-115 mm. Rio Doce, between Linhares and Porto 

 Souza. Hartt & Copeland, and two specimens 20883, 65-78 mm. Sao Matheos. 

 Hartt & Copeland. 



These specimens are in rather bad condition. They differ from A. jequitin- 

 honhae in the increased number of gill-rakers (10 +16 to 18, Rio Doce; 6 to 

 9 + 12-17, Sao Matheos). Head 4; depth 2.8-3^; D. 11; A. 26-29; eye 2.5-3 

 in the head. 



52. ASTYANAX FASCIATUS MACROPHTHALMUS Regan. 



Plate 49, fig. 6. 



Astyanax aeneus Meek (?io7i Gunther), Publication Field Columbian mus. zool., 1904, 5, p. 86 (in part) 



(Motzorongo). 

 Astyanax rulilus var. Eigenmann & Ogle, Proc. U. S. N. M., 33, p. 23 (Mexico; Motzorongo; Vera 



Cruz). 

 Astyanax macro phthalmus Regan, Biologia Central! Americana, Fishes, 1908, p. 169, 171, pi. 26, fig. 4 



(Motzorongo). 

 Astyanax fasciatus macrophthalmus Eigenmann, Rept. Princeton univ. exped. Patagonia, 1910, 3, p. 433. 



Habitat. — Southern Mexico. 



