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PATAGONIAN EXPEDITIONS : PALEONTOLOGY. 
The most important contribution to the Patagonian fauna was made in 
1897 by v. Ihering. Following Ameghino, who furnished the material, 
v. Ihering distinguishes two marine horizons, the Patagonian and Supra- 
patagonian (or marine Santacruzian) beds, a division, which is not ac- 
cepted by us. For the present, however, we shall give the list of species 
added to these faunas, as v. Ihering has given it. 
The following are the so-called Patagonian species added by him : 
1. Rhynchonella plicigera. 5. Pecten pramuncius . 
2. Magellania glob os a (M. lenticular is'), 6. Mytilus cf. chorus. 
3. Bouchardia zitteli. 7. Venus volckmanni . 
4. Perna quadrisulcata . 8. Struthiolaria ameghinoi. 
All these 8 species are represented in our collections. A few more 
species given by v. Ihering are to be dropped as synonyms (so Cucullcea 
dalli and multicostata = C. alta; Turritella argentina and steinmanni = T. 
ambulacrum; Trophon laciniatus var. santacruzensis = T. patagonicus ) . 
Pecten patagonensis and Siphonalia cf. nodosa are very doubtful, and Tro- 
phon various has been dropped by v. Ihering himself in 1899. 
The following are the new Suprapatagonian species : 
1 . Schizaster ameghinoi. 
2. Area patagonica. 
3. Pectunculus pulvinatus cuevensis ( Glyci - 
meris ibari). 
4. Pecten centralis (P. proximus). 
5. Modiola ameghinoi. 
6. Crassatella longior ( Crassatellites ll). 
7. Amathusia angulata. 
8 . Venus striatolamellat a (V. navidadis ). 
9. Cy there a splendida ( Meretrix iheringi ). 
10. Dosinia meridionalis . 
1 1 . Tellina perplana. 
12. Tellina patagonica. 
1 3 . Tellina jeguaensis. 
14. Mactra indistincta. 
15. Solen elytron. 
16. Glycimeris quemadensis ( Panopea q.). 
17. Pholas paticispina. 
18. Dentalium octocostatum [D. octocostellum ). 
19. Fissurell a sp. 
20. Gibbula dalli. 
2 1 . Eulima subventricosa. 
22. Odostomia suturalis ( Odontostomia si). 
23. Turbonilla cuevensis. 
24. Trochita magellanica ( Infundibulum cly- 
peoluni). 
25. Natica consimilis. 
26. Natica subtenuis. 
2 7. Triton dautzenbergi. 
28. Trophon pyriforniis (Urosalpinx pi), 
29. Trophon leucostomoides (Urosalpinx ll). 
30. Marginella quemadensis. 
3 1 . Marginella confinis . 
32. Marginella gracilior. 
3 3 . Marginella plicifera. 
34. Voluta ameghinoi. 
3 5 . Voluta patagonica. 
36. Cancellaria ameghinoi. 
3 7. Cancellaria gracilis. 
38. Pleurotoma disc or s (P. unifascialis). 
39. enota G cuevensis. 
40. Bulla patagonica. 
