^O-t PROF. EHRENBERG ON FOSSIL INFUSORIA. 



The animals which I found in the above-mentioned fossils are the 

 following species. 



I. Nine species in the stone from Franzensbad. 



1. Navicula viridis, as chief mass; 2. N. gibba; 3. N.fulva; 

 4. N. Librile, all freshwater animalcules, very common in the 

 neighbourhood of Berlin ; — 5. N. viridula ; 6. N. striaiula ; 

 both sea animalcules now living : the first I know of only from 

 the Baltic, near Wismar; the second from near Havre in France, 

 and in the mineral water of Carlsbad ; — 7- Gomphonema pa- 

 radoxmn ; 8. G. clavatum : both species now common near 

 Berlin ; — 9. A species of Gaillonella, G. varians? of which I 

 have hitherto seen only fragments. 



II. In the peat-bog of Franzensbad I found, around the Kieselguhr, 

 five species : 



1 . Navicula granulata, as the most usual form, not occurring in 



the Kieselguhr ; 2. N. viridis, rare ; 3. JBacillaria vulgaris} ; 



4. Cocconeis undulata ; both sea animals ; — 5. Gomphonema 



paradoxum (clavatum}), still found near Berlin. 



Only two forms are common to the turf and the Kieselguhr, which 



is found in it, and which thence probably owes its origin to a different 



period. 



III. I found in the Kieselguhr of the Isle of France several species : 



1. Bacillaria vulgaris! as chief mass; % B. major, an unknown 

 species, but perhaps allied to the former, which is a. well- 

 known sea animalcule ; 3. A small Navicula, perhaps the in- 

 fant state of N.fulva ; 4. N. gibba ; 5. N. bifrons, a still living 

 species, occurring rarely near Berlin. 



IV. The Bergmehl of Santa Flora, or San Fiore, of Klaproth's col- 

 lection contains nineteen different species : 



1. Synedra capitata, new species, as chief mass, between which 

 2. S. Ulna, an animalcule living both in fresh and sea water ; 

 — 3. Navicula incEqiuilis ; 4. N. capitata ; 5. N. viridis ; 6. N. 

 gibba; 1. N.phoenicenteron; S. N. Librile ; 9. N Zebra; d\\ 

 freshwater animalcules; — 10. N. viridida, a sea animalcule 

 from the Baltic; — 11. N.gramdata; 12. iV^.i^o/Zz*; twoyetun- 

 knoAvn or extinct species; — 13. Cocconeis undulata, a sea ani- 

 malcule; — 14. Gomphonema paradoxum ; 15. G. clavatum; 

 16. G. acumiyiatum; freshwater animals from Berlin; — 17. 

 Cocconema cymbiforme, a freshAvater animalcule ; 1 8. Gail- 

 lonella italica, new species; 19. Siliceous needles of a sea 

 Spongia, or freshwater Spongilla. 



V. In the Pohrschiefer of Bilin, specimens of which M. Weiss had 

 himself collected there, I found four species: 



