SOUTH AMERICAN NEMATOGNATHI. 



Loricariidie 



Argii clre 



Nematogenyinse 

 Pygidinse -f 



Stegopliilintet Cetopsin' 

 Bagrinas * 



BunocepLalicloD 



CallichthyidfG 



Hypophtlialmidfe Auchcniptcrinra 



Diplomystidae 

 Primitive NcmatognatM 

 Primitive Ostariophysize 



'fPygididaB 



