ORTMANN : TERTIARY INVERTEBRATES. 
2. Scutella patagonensis. j 
[base : San Julian; Salt Lake; Lake Pueyrredon. 
[top : Rio Chalia ; 30 miles north of Rio Chalia. 
3. Rhynchonella plicigera. j 
[base: Lake Pueyrredon. 
[ top : Las Salinas ; Shell Gap. 
4. Terebratella dorsata. j 
[base: Lake Pueyrredon. 
[ top : Shell Gap. 
5. Terebratella patagonica. j 
[base: San Julian; Salt Lake; Lake Pueyrredon. 
[top: Rio Chalia ; Lake Pueyrredon. 
6. Glycimeris ibari. j 
[base: Lake Pueyrredon. 
[ top : Rio Chalia ; Lake Pueyrredon. 
7. Perna quadrisulcata. | 
[base: Lake Pueyrredon. 
[top: Lake Pueyrredon. 
8. Ostrea ingens. j 
r base : San Julian ; Salt Lake ; Lake Pueyrredon. 
top: Rio Chalia; Sierro Oveja; Lake Pueyrredon. 
9. Pecten geminatus. j 
[base: San Julian; Lake Pueyrredon. 
[ top : Sierra Oveja ; Lake Pueyrredon. 
10. Modiola andina. j 
[ base : Lake Pueyrredon. 
[ top : Lake Pueyrredon. 
[ base : Paso del Rio Santa Cruz. 
1 1 . Lucina promaucana. j 
[ top : Rio Chalia. 
12. Cardium philippii. 
( base : Lake Pueyrredon. 
| top : Lake Pueyrredon. 
13. Cardium puelchum. j 
[ base : Santa Cruz. 
[ top : Sierra Oveja. 
1 4. Venus volckmamii. -j 
[ base : Santa Cruz ; Lake Pueyrredon. 
[top: Lake Pueyrredon. 
1 5 . Panopea regularis. 
[base : San Julian ; Lake Pueyrredon. 
[top : Lake Pueyrredon. 
16. Panopea quemadensis. 
[base : San Julian ; Lake Pueyrredon. 
[ top : Rio Chalia ; Lake Pueyrredon. 
1 7. Gibbula Icevis. -j 
[base: San Julian; Lake Pueyrredon. 
[ top : Lake Pueyrredon. 
18. Scalaria rugulosa. j 
[base: San Julian; Lake Pueyrredon. 
[top: Rio Chalia ; Sierra Oveja. 
T r .... (base: San Julian. 
IQ. Infundibulum corrugatmn. \ 1 . _ 
( top : Rio Chalia ; Lake Pueyrredon 
20. Turritella ambulacrum. -! 
[base: Santa Cruz ; Lake Pueyrredon. 
[ top : Rio Chalia ; Lake Pueyrredon. 
21. Turritella patagonica. j 
[base: Santa Cruz; San Julian. 
[ top : Rio Chalia. 
22. Struthiolaria ameghinoi. j 
[base: San Julian ; Lake Pueyrredon. 
i top : Rio Chalia ; Lake Pueyrredon. 
