154 



Prof. Ehrenherg on Fossil Infusoria, 



[Jan. 



I. Bacillaria vulgaris ? as chief mass ; 2. B. major, an unknown 

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

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

 infant state of IV,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. Si/nedra capitafa, new species, as chief mass, between which 

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

 — 3. Navicula incBqualis : 4. N. capitatax 5. N.viridis; 6. 

 iV. gibba ; 7. N. phoeni center on ; 8. iV. Librile ; 9. N. Zebra; 

 all freshwater animalcules ; — 10. iV. «;zVi£/w/a, a sea animal- 

 cule from the Baltic ; — 11. JS. granulala ; 12. Foliis ; two 

 yet unknown or extinct species; — 13. Coccojie'is undulata^ n 

 sea animalcule ; — 14. Gomphonema paradoxum ; 15. G. cla- 

 vatum ; 16. G. acuminatum ; freshwater animals from Berlin ; 

 — 17. Cocconema cymbiforme, a freshwater animalcule; 18. 

 Gailloyiella italica, new species ; 19. Siliceous needles of a 

 sea Spongia, or freshwater Spongilla. 



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

 himself collected there, I found four species : 



1. Podosphenia nana, new species, as chief mass; 2. Gaillonella 

 distans, new species ; 3. Navicula Scalprum ? ; 4. Bacillaria 

 vulgaris ? probably all sea animals. 



VI. In the leaf-tripoli of the shops at Berlin, probably received 

 through Dresden or from the Harz, were found three precisely corres- 

 ponding species : 



1. Gailloiiella distans, as chief mass ; 2. Podosphenia 7iana, new 

 species ; 3. Bacillaria vulgaris ?. 



VII. In the Klebschiefer from Menilmontant I in two instances 

 found fragments of Gaillonella distans, but am doubtful whether they 

 may not have been derived from the Schiefer of Bilin. 



It deserves particular notice, that by far the greater number of thevSie 

 twenty-eiglit fossil species of infusoria, which all belong to the family 

 of the Bacillariee, and indeed to eight different genera nov/ existing, — 

 namely the genera Navicula, Cocconeis, Synedra, Gomphonema, Cocco- 

 nema, Podosphenia, Bacillaria, Gaillonella, — that of these twenty-eight 

 species, fourteen were undistinguishable from existing freshwater infu- 

 soria, and five species from existing marine animals. The other nine 



