PROCEEDIN'GS OF THE NATIONAL MUSEUM 



VOL. 73 



196. Tuff (thin bedded SS) on axis of anticline, 2i/^ leagues above 

 emboucheur of canyon of Rio Nirihuao into basin of Lago Nahuel 

 Huapi; and 



80 



78 76 



72 70 



66 66it>d6r.64 



62 



60 



58 



Fig. 1. — Localities in Lago Nahuel. Huapi Region, Rio Negro Territoet ; 

 2. Locality of Mihhoja, Chubut Territory ; 3. Localities in Rio Chalia 

 Region, Santa Cacz IteRRiTOEY 



198. Southeast side of Rio Nirihuao, 1% leagues above foot of can- 

 yon, 150 yards southwest of Casa Piedra (4 leagues south of Lago 

 Nahuel Huapi). 



