450 



PATAGOXIAN KXPHDITIONS : ZOOLOGY. 



GV.M NOIL'S Liiuucus.' 

 Giton Kaup. 



Type : Gyvutoius ciiia[>o Linnreus. 

 Range that of the single species. 

 .\i. Gymuotus carapo Linnaeus. 



Gymnotus fasciatus Pallas; Gyiiiiiottts 

 albtis Pallas; Gyvntotus brachyuriis 

 Bloch; Gymnotus putaol Lacepede; 

 Carapns brachynnis Cuvier; Campus 

 inccquilabiatus Valenciennes. 

 Habitat: Rio Motagua south to Rio dc 

 La Plata and San Francisco. 

 2. Gymnotus carapo pauthcriiius (Stein- 



dachncr) St., iqo8(/. 



Habitat : Santos. 



Sternopygus Mtiller & Tro.schel. 

 Type : Stcruopygus iiiacrurus ( Bloch & 

 Schneider). 



Range: Paraguay and Rit) San Fran- 

 ci.sco to iMagdalena and Guayaquil. 

 .\ I . Stivnopygus macrurus Bloch & Schnei- 

 der. 

 Carapus an-iiatus I",\-doux .Souleyet; 

 Carapus sanguinolcutus Castelnau ; 

 Sternopygus marcgravii Reinhardt; 

 Gymnotus carapns Giinther and other 

 recent authors iion Linnaeus. 

 Habitat: Orinoco, south to Paraguay 

 and Rio das Velhas. 

 2. Sternopygus aequilabiatus (Humboldt). 



Habitat: Magdalena and Guayaquil. 

 A3. Sternopygus obtusirostris Steindachner. 



Habitat : Amazons and Rio Puty. 

 4. Sternopygus ccquilabiatus nigriceps \on 



Ihering, v. I., 1907. 



Habitat: State of Maraubam. 



Family ELECTROPHORID^. 

 Electrophorus Gill. Ai. Electroplioms electricus (Linnsus), 



Type: Gymnotus electricus Linnaeus. 

 Range that of the single species. Habitat : 



Giinther, VI I L 

 Brazil and northward. 



Order SYNBRANCHL^. 

 Familv SYNBRANCHID^. 



Synbranchus Bloch. 



U nibranchapterura Lacepede ; Ophister- 

 non McClelland; Tetrabrauchus 

 Bleeker. 



' In a recent paper (The (jymnotidiv, I'roc. Wash. 

 Acad. Sci., VII, \1. 174) I followed Gill in using the 

 name Gymnotus for the current Gymnotus carapo 

 Linn;eus, this species being the only one described 

 by Linna:us in his tenth edition. No doubt seems to 

 have been entertained about the nature of the Gymnotus 

 carapo of Linna;us and its supposed synonymy and 

 bibliography were given in the paper quoted above. 

 P- 175- 



Mr. Lonnberg has kindly called my attention to his 

 paper (Bihang till K. Svenska Vet.-Akad. Ilandb., 

 XXII, Afd. IV, 23, 1896) on Linnean Type-specimens 

 in which he has shown that the type of Linnseus is 

 not the current Gymnotus carapo, but the Gymnotus 

 fasciatus of Pallas or Gilon fasciatus Auct. The latter 



Type : Synbranchus marmoratus Bloch. 

 Range; Tropical America and Indies. 

 .\i. Synbranchus marmoratus Bloch, 



Meek, 89. 

 Synbranchus immaculatus Bloch; S. 



species must therefore stand as Gymnotus carapo Lin- 

 nxus, the name Gymnotus replacing the more recent 

 Gilpn. 



The current Gymnotus carapus must be known by its 

 oldest name, which is macrurus Hloch & Schneider. 

 Miiller & Troschel in 1849 proposed the name Sterno- 

 pygus for macrurus, tumifrons. vircscens, lineatus, and 

 ccquilabiatus. In 1894 I selected as the type of Sterno- 

 pygus the then current carapo, of which macrurus was 

 a synonym. The fact that the name carapo of Linnxus 

 did not refer to the species under consideration need 

 not invalidate this restriction, since there was no doubt 

 whatever about the fish that was intended to serve as 

 type. It may stand as Sternopygus macrurus (Bloch & 

 Schneider). 



