MICROSCOPICAL OBSERVATIONS. 



SULLIVAN S ISLAND, S. C. 



Dec. [1th, 1849. On the logs and stones of the breakwater, in front of 

 Moultrieville, I found the following forms : 



DlATOMACEjE. 



Achnanthes 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 closterium, Ehr. 



Coscinodiscus lineatus, Ehr. 

 Grammatophora oceanica.Ehr. 

 Gallionella sulcata, Ehr. 

 Navicula sigma, Ehr. 

 Licmophora radians, Kg. 



CHARLESTON NECK. 



Dec. 19th, 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 ampullaeeum, Ralfs. 

 Penium digitus, Ehr. 



Scenedesmus obliquus, Turp. 

 Docidium nodulosum, Br6b. 

 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 Diatomacea; were noticed. 



Actiniscus sirius, Ehr. 

 Actinocyclus bioctonarius, Ehr. 

 Actinoptychus senarius, Ehr. 

 Biddulphia pulchella, Gray. 

 Cocconeis scutellum, Ehr. 

 Coscinodiscus excentrieus, Ehr. 

 Dictyocha fibula, Ehr. 

 Eupodiseus Rogersii, Ehr. 

 *Eupodiscus radiatus, B. 

 Gallionella sulcata, Ehr. 



Navicula sigma, Ebr. 

 Pinnularia interrupta, Kg. 

 " didyma, Ehr. 



lyra, Ehr. 



Rhaphoneis rhombus, Ehr. 

 Stauroptera aspera, Ehr. 

 *Surirella circumsuta, B. 

 Terpsinoe musica, Ehr. 

 Triceratium favus, Ehr. 



alternans, B. 



* Species marked \vilh a star are believed lo be new. and are described at page 36. 



