■a£\ 



Oo- a 1 



2<u 



<*. — a> 



OSi 



O H 



fl-°o 



aS 



'Sc°g 



,2<3 



»OK 





tfo-3 



rttf 



o 



-G as 



05 * 

 a^S 

 2 2 3 



bOK^ 



a> a! 



^533 





boo t) 



c oi— bo 



h m ^ O 

 3 14th 



ooSOW 



al o 





■a o 



o a 



z -_' - 

 OtB £ 



4>p^ a! 



^•a 5? 



Ostrea wilckensi Ih 



' ' guaranitica Ih 



Gryphnea rostrigera Ih 



" concors Ih 



" pyrotheriorum Ih 



' ' rothi Boehm 



" hurckhardti Boehm . . . 

 Exogyra ostracina Lam., var. 



mendozana Ih 



Exogyra callophyla Ih 



Perna sp 



Lima sp 



Hinnites sp 



Pecten sp 



" piconus Ih 



Chlamys patagonensis d'Orb., 



var. negroina Ih. .... 



Myochlamys Salamanca Ih 



Pododesmus (Placunanomia) 



valchetanus Ih 



Plicatula aff . multicostata Forb. 



(fide Burckhardt) 



Mytilus sp 



Modiola rionegrensis Ih 



" andina Ortm. ** 



Nucula dynastes Ih 



Malletia ornata Ih 



Area sp 



Cuculhea (Area) tehuelcha Ih. . . 



" rocana Ih 



Trigonia sp 



Cardita (Venericardia) ameghin- 



orum Ih 



Cardita (Venericardia) iheringi 



Boehm 



Cardita (Venericardia) burmeisteri 



Boehm 



Cardita (Venericardia) palseo- 



patagonica lh 



Cardita (Venericardia) patagonica 



Cardium (Hemicardium) rocanum 

 Ih 



Phacoides (? Cardium) rocana Ih. 



Dosinia burckhardti Ih 



Chione (Venus) eupyga Ih 



Cytherea chalcedonica Ih 



Tellina burmeisteri Ih 



Solecurtus sp 



Lutraria ameghinoi Ih 



Panoprea inferior Wilck. (=p. 

 thomasi Ih.) 



Corbula sehuena Ih 



Entomostraca. 

 Balanus sp 



X 



X 



.X 



X 

 X 



X 



x. 



x, 



X 



X 



X 



X 



X. 



X 



X. 

 X 



X 



■ X 

 • X, 



X. 



X 

 X 



..x 

 . .x 



x 



X 

 X 



x. 



X 



.X.. 

 .X 



(X)? 



X 



x. 



x. 



X 

 X 

 X 

 X 



(X)? 



X 



X 



X 



X 



x, 



X 



x. 

 x. 



X. 



x. 



x 



.X 

 X 

 X 



X 



X 



X 



X 



** This shell has also been found at the Lake Pueyrredon, according to Ortmann and v. Ihering. 



