14 



MICROSCOPICAL OBSERVATIONS. 



FLORIDA 



Feb. 20th, 1850. — In sphagnous swamps, near the village of Pilatka, Florida, 

 I found the species named below. 



Desmidie.e. 

 Closterium aoerosum, Sclir. 



" Dianee, Elir. 



*Cosmarium depressa, B. 

 Didymoprium Borreri, Ralfs. 

 Didymocladon furcigerus, Ralfs. 

 Docidium minutiim, Ralfs. 

 Euastrum elegans, Breb. 



" sublobatum, Breb. 

 Micrasterias truncata, Breb. 

 Peniura digitus, Breb. 

 Staurastrum gracile, Ralfs. 

 " triconie, Breb. 



" polymorpbum, Breb. 



Xanthidium armatum, Ehr. 



" fasciculatum, Ehr. 



DiATOMACEJi:. 



Himantidium diodon, Elir. 

 Pinnularia vii-idis, Ehr. 



Infusoria. 

 Actinophrys viridis, Ehr. 

 Amoeba princeps, Ehr. 

 Arcella dentata, Ehr. 

 " vulgaris, Ehr. 

 Metopidia lepadella, Ehr. 

 Monostyla lunaris, Ehr. 

 Noteus quadricornis, Ehr. 

 Pterodina patina, Ehr. 

 Rotifer vulgaris, Schr. 

 Stylonychia mytilus, Ehr. 

 Cothurnia imberbis, Ehr. 



PILATKA. — continued. 



The following species were found in a living state, attached to a log in the 

 St. John's River, at Pilatka, viz : 



Bacillaria paradoxa, Ehr. 

 *Campylodiscus argus, B. 



Odontella polymorpha. Kg 



PILATKA.- 



-continued. 



In a ditch by the roadside, three miles from Pilatka, I found these species. 



DSSMIDIE.E. 



Didymoprium Borreri, Ralfs. 

 (in conjugation.) 

 " Grevillii, Ralfs. 



Euastrum ampullaceum, Ralfs. 

 Hyalotheca dissiliens, Breb. 

 Tetmemorus Brebissonii, Ralfs. 



D1.A.T0MACE/E. 

 Eunotia tetraodon, Ehr. 



Infusoria. 

 Colurus tricuspidatus, Ehr. 

 Dinobryon sertularia, Ehr. 

 Pterodina patina, Ehr. 

 Stentor polymorphus, Ehr. 



