MICROSCOPICAL O II 8 E R V A T I O N S . 25 

 PONDS AT ENTERPRISE. continued. 



IXFUS jlilA. 



Arcella aculeaui, Ehr. Philodina vesiita, H. PI. ,'!, figs. 9 and 14. 



Conochilus volvox, Ehr. PI. 3, fig. 2. Rotifer macrourus, Khr. 



Uinobryou sertularia, Ehr. " pannosus, B. PI. 3, figs. 6, 7. 



Gouium glaucum, Ehr. " vulgaris, Schr. 



Hydatina senta, Ehr. Spirostomum ambiguuin, Ehr. 



Lacinularia socialis, Ehr. Stephanoceros Eichhornii. Elir. 



"Mi-lieerta nuda, B. PI. 3, figs. 8, 10. 



ringens, Schrank. *Diatoma stcllaris, B. 



*Peridinium carolinianum, B. PI. 3, figs. 4, 5. Tabellaria fenestratum, Ehr. 

 Philodina aculeata, Ehr. 



SULPHUR SPRINGS .NEAR ENTERPRISE, ETC., FA. 



The enormous sulphur springs of Florida are among the most remarkable of 

 the features of this interesting region. They are often from fifty to one hundred 

 feet in diameter, and as many in depth, and pour out bold streams of sulphuret- 

 ted water of such magnitude that large boats may proceed up them directly 

 into the basins of the springs. The sulphur springs at Orange Spring, (Pear- 

 son's), the Blue Spring on the St. John's, and the Green Spring at Enterprise, 

 are the most remarkable which I saw. In all of these I noticed immense quan- 

 tities of an Oscillatoria which, I believe, is the O. terebriformis of Agardh, with 

 the description of which in Kiitzing's Species Algarum, p. 239, it agrees perfect- 

 ly. Its very active vermiform and spiral motions I observed very frequently 

 while at Enterprise. It is accompanied at the springs by a white plant, gene- 

 rally more or less coated with sulphur, which appears to be the Beggiatora 

 raineriana of Meneghini. (See Kiitzing, 1. c. p. 237.) In my notes I have re- 

 corded the following forms as found in Demaster's Sulphur Spring, " close to the 

 Boil." 



Closterium acerosum, Sohr. Navicula elongata, (?) 



Pinnulaiia viridis, Ehr. 



*Amphiprora pulchra, B. Beggiatora raineriana, Menegh. 



Eunotia gibba, Ehr. Oscillatoria terebriformis, Ag. 



Navicula cuspidata, Kg. 



ADDITIONAL OBSERVATIONS IN GEORGIA. 



On my return from Florida, I visited the interior of Georgia, hoping to have an 

 opportunity of comparing the inland microscopical forms with those of the coast 

 which I had previously studied. I was disappointed, however, by the almost 

 constant rains, which in the hilly or mountainous regions produced freshets 

 which swept away everything living in the streams, or buried them in mud. I 

 have, therefore, only to record the species noticed at two localities. 

 * 1 





