. The Deseado formation of Patagonia . CapeVirgenes, on which from above Punta Atlas south to belowPico Salamanca, the Casamayor ( = Notostylops) bedsfill the interval from the Salamanca formation up to thePatagonian. On the strength of this map I followed thesebeds the whole distance looking for vertebrate fossils ofCasamayor age. Nowhere did we find a Casamayor at several points we did find marine fossils. Ican not but feel that these beds are plotted as Casamayor,because of their resemblence in color and general textureto the beds carrying the Notostylops fauna at Casamayor.
. The Deseado formation of Patagonia . CapeVirgenes, on which from above Punta Atlas south to belowPico Salamanca, the Casamayor ( = Notostylops) bedsfill the interval from the Salamanca formation up to thePatagonian. On the strength of this map I followed thesebeds the whole distance looking for vertebrate fossils ofCasamayor age. Nowhere did we find a Casamayor at several points we did find marine fossils. Ican not but feel that these beds are plotted as Casamayor,because of their resemblence in color and general textureto the beds carrying the Notostylops fauna at Casamayor. Of several sections of these beds I pick out two as typical,and also because they are near the locality which we workedfor the Deseado fauna. On the map they are indicatedas A and B. The former passes through a bed of greensands which is, I think, the locality indicated as his north-ern locality for the Pyrotherium fauna. From Punta Atlas to Pico Salamanca, Ameghino plotsat or just below sea level a bed known as the Salamanca, TO s;h. ici it. Fig. 3. Section at A on map page 5. showing strata from sea level up to the Patagonian. Wh\Ve SawXv . • ■■•■^■•13 (■■■■ i ■ .*. •.-»•> .. •■ ■ *. , ^^jL^?.^^^??/^- // 7^ r/ /y////^yy/yy ■/my /• / yyy^/:.^/^yyyy^y-y^ /./. ^/fi:. •/. v^y^/yyyy^y whiie SahciuClaj^^ r^y/y/y/yy^- •^•/. my>/^//mmwy>y /^^V::LVjl7---^Wfiifpg-gvPS ^^^ ^^^.^^. ^ Wffiffffyfff^ itit r T r-- ■ ■ g « o o g ■ * * f kSiia(eSf-^J^r ~ ~ ~ ~i ~i i^ r~i I \ III ^-J- J^ /5 70 >i^JSS^ Fig. 4. Section B on map, page S. showing strata from sea level up to the Patagoman. 14 THE DESEADO FORMATION OF PATAGONIA being typically developed opposite Pico this in the neighborhood of Pico Salamanca we foundthe fauna typical of this horizon. Ostrea rostigera v. riongrensis \. ameghinoi v. salamanca v. striatissima v. calccdonica
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