448 



PATAGONIAN EXPEDITIONS! ZOOLOGY. 



Valenciennes; Macrodon jerox Gill; 

 Macrodon intermedius Giinther. 

 Habitat: Eastern slope of South 

 America from La Plata to Rio Mag- 

 dalena and Huallaga. 



3. Hoplias malabaricus micro phthalmus 



Pellegrin. 

 Habitat: French Guiana. 



4. Hoplias lacerda Ribeiro, Ribeiro, 1908. 



Habitat: Ribeira. 



HOPLERYTHRINUS Gill. 



Ophiocephalops Fowler. 



Type : Erythrinus unitcsniatus Spix. 

 Range : From the La Plata to the Ori- 

 noco, including south-eastern coast- 

 wise streams. 



Ai. Hoplerythrinus unitaniatus (Spix). 

 Erythrinus vittatus Cuvier & Valen- 

 ciennes ; Erythrinus cinereus Gill ; 

 Erythrinus kessleri Steindachner. 



Habitat : La Plata to Guiana and Peru ; 



Trinidad. 

 2. Hoplerythrinus salvus (Agassix). 



Erythrinus gronovii Cuvier & Valen- 

 ciennes. 



Habitat: San Francisco; Guiana; Ori- 

 noco. 



ERYTHRINUS Gronow. 



Type : Cyprinus cylindricus Linnaeus. 



Range : Rio Janeiro to Surinam and 



Peru. 



Ai. Erythrinus erythrinus (Bloch& Schnei- 

 der). 



Cyprinus cylindricus Linnaeus ; Cypri- 

 nus cephalus Linnaeus; Erythrinus 

 salmoneus Gronow ; Erythrinus brev- 

 icauda Giinther. 



Habitat: Rio Janeiro to Surinam and 



Peru. 

 2. Erythrinus longipinnis Giinther. . 



Habitat : Essequibo. 



Family GYMNOTID^. 1 



STERNARCHUS Bloch & Schneider. 



Type: Gymnotus albifrons Linnaeus. 

 Range : Paraguay, Parana and San 



Francisco to the Orinoco. 

 I. Sternarchus brasiliensis Reinhardt. 



Habitat: Basin of the Rio San Fran- 

 cisco and the Parana and Paraguay. 

 A2. Sternarchus albifrons (Linnaeus). 



Sternarchus lacepedii Castelnau ; Stern- 

 archus maximilliani Castelnau. 

 Habitat: Guianas, Amazons and Para- 

 guay. 

 A3. Sternarchus bonapartii Castelnau. 



Habitat: Amazons. 



A4. Sternarchus macrolepis Steindachner. 

 Habitat: Amazon near mouth of Rio 

 Negro; Guiana. 



1 For the details concerning this family, see Eigen- 

 mann & Ward, Proc. Wash. Acad Sci., vii, pp. 159-188. 



STERNARCHELLA Eigenmann and Ward. 



Type : Sternarchus schotti Steindach- 

 ner. 



Range : Amazons. 



Ai. Sternarchella schotti (Steindachner). 

 Habitat: Amazons, from the Barra do 



Rio Negro to Peru. 

 A2. Sternarchella balcenops (Cope). 

 Habitat : Peruvian Amazon. 



STERNARCHOGITON Eigenmann & Ward. 



Type : Sternarchus nattereri Steindach- 

 ner. 



Range: Rio Negro and Orinoco. 

 Ai. Sternarchogiton nattereri (Steindach- 

 ner). 



Habitat : Barra do Rio Negro. 

 2. Sternarchogiton sachsi (Peters). 

 Habitat: Orinoco. 



