MICROSCOPICAL OBSERVATIONS. 



SULLIVAN S ISLAND, S. C. 



Dec. ilth, 1849. — On the logs and stones of the breakwater, in front of 

 Moultrieville, I found the following forms : 



DlATOMACE^. 



Achnantlies longipes ? Ag., forming very long bands, 

 containing 50 to 100 frustules, mounted on a 

 long footstalk. (See fig. 1, pi. 2.) 



Amphora Lybica, Ehr. 



Ceratoneis fasciola, Ehr. 



Ceratoneis olosterium, Elir. 



Coscinodiscus lineatus, Ehr. 

 Grammatophora oceanica.Ehr. 

 Gallionella sulcata, Ehr. 

 Navicula sigma, Ehr. 

 Licmophora radians, Kg. 



CHARLESTON NECK. 



Dec. \Wi, 1849. — In company with Prof Gibbes, of Charleston College, I col- 

 lected the following forms in a fresh-water ditch near " the Lines," viz : 



Bacillaria paradoxa, Ehr. 

 Synedra valens, Ehr. 

 Closterium acerosum, Schrank. 

 Cosmarium undulatum, Corda. 



" cucumis, Corda. 



" margaritiferum, Turp. 



Euastrum ampullaceum, Ralfs. 

 Penium digitus, Ehr. 



Scenedesmus obliquus, Turp. 

 Docidium nodulosum, Breb. 

 Amblyophis viridis, Ehr. 

 Arcella vulgaris, Ehr. 

 Euglena viridis, Ehr. 



" pleuronectes, Ehr. 

 Stentor polymorphus, Ehr. 



MUD OF CHARLESTON HARBOR. 



In mud collected from the logs of wharves, and from other situations in 

 Charleston Harbor, the following species of Diatomacese were noticed. 



Actiniscus sirius, Ehr. 

 Actinocyclus bioctonarius, Ehr. 

 Actinoptychus senarius, Ehr. 

 Biddulphia pulohella. Gray. 

 Cocconeis scutellum, Ehr. 

 Coscinodiscus excentricus, Ehr. 

 Dictyocha fibula, Ehr. 

 Eupodiscus Rogersii, Ehr. 

 *Eupodiscus radiatus, B. 

 Gallionella sulcata, Ehr. 



Navicula sigma, Ehr. 

 Pinnularia interrupta. Kg. 



" didyma, Ehr. 



" lyra, Ehr. 



Rhaphoneis rhombus, Ehr. 

 Stauroptera aspera, Ehr. 

 *Surirella circumsuta, B. 

 Terpsinoe musica, Ehr. 

 Trieeratium favus, Ehr. 



" alternans, B. 



* Species marked with a star are believed to be new, and are described at page 36. 



