174 EIGENMAXN AND WARD 



head, young examples from Paraguay have the same form 

 and differ in this respect from the bulk of the Rio Grande 

 specimens recorded by Eigenmann. 



24. EIGENMANNIA AXILLARIS (Giinther). 



Stcrnopygus axillai'is Giinther, Cat., VIII, 8, 1864, Para; 

 Eigenmann & Eigenmann, Proc. U. S. Nat. Mus., XIV, 

 1891, 62. 

 Habitat: Para. 



25. EIGENMANNIA TROSCHELI (Kaup). 



Sternofygiisvh-escens, Miiller & Troschel, Hor^e Ichthyol., Ill, 

 14, 1849 (Guiana); not of Valenciennes. 



Sternopy gtis t7-oscheli 'K.diVi^, Apod., 139, 1856; Steindachner, 

 Die Gymnotidee, 12, 1868 (Barra do Rio Negro) ; Giinther, 

 Cat., VIII, 8, 1864; Cope, Proc. Am. Philos. Soc. 1878, 

 682 (Peruvian Amazon); Steindachner, Fisch-f. Magdal., 

 56, 1878 (note) ; Eigenmann & Eigenmann, Proc. U. S. Nat. 

 Mus., XIV, 1891, 62. 

 Habitat : Amazonas from Manaos to Peru. 



10. Gymnotus Linuceus. (Figs. 17-19.) 



Gymnottis Linnteus, Syst. Nat., ed. X, 246, 1758 (type: 

 Gymnotus carafo Linnaeus); ed. XII, i, 427, 1766 {carapo; 

 electrictts ; albifrons ; rostrattis ; asiaticits). 



Gymnotus Lacepede. 



Gymnotus Cuvier Regne Animal, ist ed., II, 235, 1817 (sp. 

 electricus^ cBqiit'labiatus); Giinther, Cat., VIII, 10, 1870 (re- 

 stricted to electrtcus). 



Sternopygus Muller & Troschel, Horee Ichthyol., Ill, 13, 1849 

 (inacricrus = cai'apo ; tuniifrons = vif'csccns ; vircsccns ; Unc- 

 ut us ; cequ ila b ia tus). 



Sternopygus Eigenmann, Ann. N. Y. Ac. Sci., VII, 1894, 

 326 (restricted to carapo^ to include carapo, cequilabiatiis 

 and obtusirostris). 



Gyninotcs Gill, Proc. Ac. Nat. Sci. Phila. 1864, 152 {ccquila- 

 biatus). 

 The first species of the Stcrnopygidcc mentioned in literature 



is the carapo of Marcgrav, 



