XXXI. AUSTROMENIDIA 65 



AusTROMENiDiA Hubbs, Proc. Acad. Nat. Sci. Phila., 69, 307, 1918. 



Orthotype. — Basilichthys regillus Abbott. 

 Range. — Temperate portion of South America, along the coast and in lakes and 



streams from Uruguay and Peru south to the Straits of Magellan ; also 



about the Falkland and Juan Fernandez Islands 



We refer to Austromenidia most of the large fine-scaled atherines 

 of temperate South America. The typical species are unlike those of 

 other genera, but some of the species approach Odontesthes, Kronia, 

 and Menidia. The species are mostly poorly known, and have been 

 greatly confused by ichthyologists. Several of the west coast species 

 have been recorded on an obviously unsatisfactory basis from Argentina. 

 We have made an effort to determine the proper synonymy, status and 

 distribution of each form, as far as the facts are known. 



104. Austromenidia bonariensis (Cuvier and Valenciennes), 1835.-^*- 



Atherina bonariensis Cuvier and Valenciennes, Hist. Nat. Poiss., 10, 469, 1835. 

 [Basilichthys] bonariensis Girard, U. S. Nav. Astron. Exp., 238, 1860. 

 Atherinichthys bonariensis Giinther, Catalogue Fishes Brit. Mns., 3, 404, 



1861 (and of authors in general). 

 Chirostoma bonariensis Eigenmann and Eigenmann, Proc. U. S. Nat. Mus.. 



14, 66, 1891. 

 Basilichthys bonariensis Evermann and Kendall, Proc. U. S. Nat. Mus., 30, 



95, 1906. 

 'Menidia bonariensis Thompson, Proc. U. S. Nat. Mus., 50, 406, 1915. 

 Atherina bonasicosi Bleeker, Nalezingen op de Ichthyologic van Japan, 41, 



1853 (apparently a slip in chirography for bonariensis). 

 Type-locality. — Buenos Aires, Argentina. 

 ? Atherina lessoni Cuvier and Valenciennes, Hist. Nat. Poiss., 10, 471, 1835 

 (based on an inadequate drawing). 

 Type-locality. — Santa Caterina, Brazil. 

 .■\therina lichtensieinii Cuvier and Valenciennes, Hist. Nat. Poiss., 10, 476, 1835; 

 Gunther, Catalogue Fishes Brit. Mus., 3, 404, 1861. 

 Type-locality. — Montevideo, Uruguay. 

 Range. — Argentina, Uruguay, and possibly southeastern Brazil ; chiefly in fresh 

 water. 



105. Austromenidia hatcheri (Eigenmann), 1909.-^'- 



.A.THERiNiCHTHYs MicROLEPiDOTUS Perugia, Ann. Mus: Gcnova, 30, 32, 1891 ; Berg, 

 An. Mus. Nac. Buenos Aires, 4, 66, 1895. 

 Basilichthys microlepidotus Evermann and Kendall, Proc. U. S. Nat. Mus., 

 31, 97, 1906; Thompson, ibid., 50, 464. 1916 (not Atherina microlepidota 

 Jenyns). 

 Menidia hatcheri Eigenmann, Repts. Princeton Univ. Exp. Patagonia, 3, 281, 

 pi. 37, fig. 4, 1909. 

 Type-locality. — Lake Pueyrredon, Patagonia. 

 Range. — Fresh waters of Argentina. 



