354 



PATAGONIAN EXPEDITIONS: ZOOLOGY. 



Range of the most widely distributed genus 

 of characins, Astyanax. (It occurs in Trini- 

 dad.) 



Range of the characid genus Brycon. 



Range of the most widely distributed cat- 

 fish genus Rhamdia. (In Trinidad.) 



5YNBRANCHUa 



Range of SjTibranchid eel in America and 

 Asia. One of the two South American 

 genera that have reached Cuba. (In Trini- 

 dad.) One species. 



To Illustrate the Origin of the Pacific Slope Fauna. 



