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PATAGONIAN EXPEDITIONS! ZOOLOGY. 



A 1 5. Myletts orbicularis Steindachner. 



Habitat: Santarem. 

 16. Mylcus orinocensis Steindachner. 



Habitat: Orinoco. 



Colossoma Eigenmann. 



Wait etna and Reganina Fowler. 

 Type: Myletes oculus Cope. 

 Range : Amazon and La Plata Basins. 

 Not in southeastern coastwise 

 streams. 

 Al. Colossoma oculus (Cope). 



Habitat: Ambyiacu. 

 A2. Colossoma nigripinnis (Cope). 



Habitat: Amazons. 

 3. Colossoma mitrei (Berg). 



Habitat : Parana. 

 A4. Colossoma bidens (Agassiz). 



Habitat: Amazons. 



5. Colossom.a orbignyanum (Cuvier & Va- 



lenciennes). 

 Habitat : La Plata Basin. 



6. Colossoma herniarium (Cope). 



Habitat: Peruvian Amazon. 



Mylosoma Eigenmann. 



Type : Myletes alb isc opus Cope. 

 Range: Guiana and Orinoco to the La 

 Plata Basin ; not in the coastwise 

 streams of southeastern Brazil. 

 Al. Mylosoma aureum (Spix). 

 Myletes auriventris Cuvier. 

 Habitat: Orinoco to La Plata Basin. 

 A2. Mylosoma albisco pus (Cope). 

 Habitat : Ambyiacu. 



Rhaphiodon Agassiz. 



Type : Rhaphiodon vulpinus Spix. 

 Range that of the single species. 

 A 1. Rhaphiodon vulpinus Spix. 

 Habitat: Orinoco to La Plata. 



Cynodon Spix. 

 Type: Cynodon gibbus Spix. 

 Range that of the single species. 

 A 1. Cynodon gibbus Spix. 



Habitat : Amazon to Rio Mamore. 



Subfamily Cynodontin^:. 



Hydrolycus Miiller & Troschel. 



Type: Hydrocyon scomberoides Cuvier. 



Range : Amazons south to the Araguay 

 and north in the Guianas to Orinoco. 

 Al. Hydrolycus scomberoides (Cuvier). 



Habitat: Orinoco and Guianas; Ama- 

 zons and south to Araguay. 

 A2. Hydrolycus copei Gill. 



Habitat : Marafion. 

 A3. Hydrolycus pectoralis Giinther. 



Habitat : Marafion. 



Subfamily Characin^:. 



Asiphonichthys Cope. 



Type : Asiphonichthys stenopterus Cope. 

 Range that of the single species. 

 1. - Asiphonichthys stenopterus Cope. 

 Habitat: Jacuhy. 



Charax Scopoli. 



Epicyrtus Miiller & Troschel; Anacyrtus 

 Giinther; Cynopotamus C. & V. ; 

 Cyrtocharax Fowler. 

 Type : Salmo gibbosus Linnaeus. 



Range : Guiana ; Amazons ; Paraguay. 

 A 1. Charax tectifer (Cope). 



C. sanguineus Cope. 



Habitat: Ecuador. 

 A2. Charax gibbosa (Linnaeus). 



Epicyrtus macrolepis Kner. 



Habitat: Guianas; Amazons and Para- 

 guay. 

 A3. Charax pauciradiata (Giinther). 



Habitat : Amazons. 

 A4. Charax lima squ amis (Cope). 



Habitat : Marafion. 



