438 



PATAGONIAN EXPEDITIONS : ZOOLOGY. 



Habitat: Villa Bella. 

 A15. Mcenkhausia xinguensis (Steindach- 

 ner). 



Habitat: Xingu. 

 A 1 6. Mcenkhausia me galops Eigenmann. 



Habitat: Gurupa to Itaituba; Guiana. 

 A17. Mcenkhausia dichrourus (Kner). 



Habitat: Paraguay Basin and Amazons. 

 A 1 8. Mcenkhausia dichrourus intermedia 

 Eigenmann. 



Habitat : Tabatinga. 

 A 1 9. Mcenkhausia lepidurus (Kner). 



Habitat: Amazons to Guianas. 

 A20. Mcenkhausia lepidurus lata Eigen- 

 mann. 



Habitat : Tapajos. 

 A21. Mcenkhausia lepidurus ices Eigen- 

 mann. 



Habitat : Iqa. 

 A22. Mcenkhausia lepidurus gracillima Ei- 

 genmann. 



Habitat: Serpa and Villa Bella. 

 A23. Mcenkhausia collettii (Steindachner). 



Habitat: Amazons; Guiana. 

 A24. Mcenkhausia copei (Steindachner). 



Habitat : Para to Santarem. 

 A25. Mcenkhausia cotinho Eigenmann. 



Habitat : Para. 

 A26. Mcenkhausia ccros Eigenmann. 



Habitat: Lake Hyanuary. 

 27. Mcenkhausia browni Eigenmann. 



Habitat: Potaro River above and be- 

 low the Kaieteur. 



28. Mcenkhausia shideleri Eigenmann. 

 Habitat : Essequibo Basin. 



Tetragonopterus Cuvier. 



Type: Tetragonopterus argenteus Cu- 

 vier. 

 Range: Orinoco and Guianas; Ama- 

 zons and south to Rio Parahyba and 

 La Plata. 

 A 1. Tetragonopterus argenteus Cuvier. 



T . rufipes Valenciennes ; T. sana Castel- 



nau. 

 Habitat: La Plata Basin to Guiana. 

 A2. Tetragonopterus huberi Steindachner. 



Habitat : Rio Purus. 

 A3. Tetragonopterus chalceus Agassiz. 



T. artedii and schomburgkii Cuvier & 



Valenciennes ; T. ortoni Gill. 

 Habitat: Amazons and Guiana. 

 4. Tetragonopterus gibbosus Steindachner. 

 Habitat: Parahyba. 



Markiana Eigenmann. 



Type : Tetragonopterus nigripinnis Pe- 

 rugia. 

 Range La Plata and Orinoco. 



1. Markiana nigripinnis (Perugia). 



Tetragonopterus anomalus Steindach- 

 ner. 

 Habitat : La Plata Basin. 



2. Markiana geayi Pellegrin. 



Habitat: Apure, Venezuela. 



Subfamily Diapomin^:. 



DlAPOMA Cope. 1. Diapoma speculiferuni Cope. 



Type: Diapoma speculiferuni Cope. Habitat: Rio Grande do Sul. 



Range that of the single species. 



Stevardia Gill. 

 Corynopoma and Nematopoma Gill 

 Type : Stevardia albipinnis Gill. 

 Range that of the single species. 



Subfamily Stevardiin^:. 



1. Stevardia albipinnis Gill. 



Corynopoma riisei and veedonii Gill ; 



Nematopoma searlsii Gill. 

 Habitat : Trinidad. 



