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PATAGONIAN EXPEDITIONS I ZOOLOGY. 



Subfamily CRENUCHIN.E. 



CRENUCHUS Gunther. 



Type: Crenuchus spilurus Gunther. 

 Range that of the single species. 

 Ai. Crenuchus spilurus Gunther. 



Habitat: Amazons and Guiana. 



PCECILOCHARAX Eigenmann. 

 Type : Pcecilocharax bovallii Eigen- 



mann. 



Range that of the single species. 



I. Poecilocharax bovallii Eigenmann. 



Habitat : Kaieteur, Potaro River. 



Subfamily IGUANODECTIN^E. 



IGUANODECTES Cope. Ai. Iguanodectes tenuis Cope. 



Type: Iguanodectes tenuis Cope. 

 Range that of the single species. 



Habitat : Ambyiacu. 



Subfamily TETRAGONOPTERIN^:. 



HENOCHILUS Garman. 

 Type: Henochilus wheatlandi Garman. 

 Range that of the single species. 



1. Henochilus wheatlandi Garman. 



Habitat: Southeastern Brazil. 



BRYCON Muller & Troschel. 



Bryconodon Eigenmann. Triurobrycon 



Eigenmann. 



Type: Brycon falcatus Muller & Tro- 

 schel. 



Range: La Plata to Guatemala in all 

 streams; western Peru, Ecuador and 

 Panama. 

 (CHALCINOPSIS Kner.) 



(Type: Chalcinopsis striatulus Kner.) 

 Ai. Brycon striatulus (Kner). 



Chalcinopsis chagrensis Kner. 

 Habitat : Ecuador to Panama. 



2. Brycon guatemalensis Regan. 



Habitat: Central America. 



3. Brycon rubricauda Steindachner. 



Habitat: Cauca. 



4. Brycon alburnus (Gunther). 



Habitat: Western Ecuador. 



5. Brycon dentex Gunther. 



Habitat: Western Ecuador to Guate- 

 mala. 

 ( MEGALOBRYCON Gunther. ) 



(Type: Megalobrycon cephalus Gun- 

 ther. ) 

 6. Brycon microlepis Perugia. 



Habitat : Upper Paraguay Basin. 

 A.J. Brycon cephalus (Gunther). 



Habitat: Peruvian Amazon. 

 A8. Brycon erythropterus (Cope). 



Habitat: Ambyiacu. 

 9. Brycon ferox Steindachner. 



Habitat: Rio Mucuri. 

 Aio. Brycon melanopterus (Cope). 



Habitat : Amazons. 

 II. Brycon devillei (Castelnau). 



Brycon insignis Steindachner. 



Habitat : Southeastern Brazil. 



(BRYCON Muller & Troschel.) 

 A 1 2. Brycon hilarii (Cuvier & Valen- 

 ciennes) . 



Habitat : Salinas ; Paraguay ; Rio San 



Francisco; Amazon. 



13. Brycon carpophagus (Cuvier & Valen- 

 ciennes) . 



Habitat : Minas Geraes. 

 14.' Brycon lineatus Steindachner. 



Habitat: La Plata. 

 A 1 5. Brycon stilbelli Steindachner. 



Habitat : Amazons. 

 A 1 6. Brycon brevicaudus Gunther. 



Habitat : Amazon Basin. 



