'/;> face p. j6p 



( 1 ) Archiguiana. 



(2) Archamazona. 

 Red, lines of primary origin of South American 



fresh-water fishes, a, from the ocean, b, from the hypothet- 

 ical Antarctic continent, c, from the hypothetical Helenis. 

 (1), (2), (7), (8) and (9), primary centers of radial mi- 

 gration. Green, lines of migration from the primary centers. 

 (3)> (4) an( ' (5)> secondary centers of radial migration. 

 Blue, lines of migration from the secondary centers. (6). 

 tertiary center of radial migration. Brown, lines of mi- 

 gration from the tertiary center. 



Map to Illustrate the Migrations of South American Fresh-VVatek Fishes. 



