THE AMERICAN MIDLAND NATURALIST. 



Micrasterias Americana (Ehrb.) Ralfs. 

 Micrasterias Torreyi Bailey. 

 Staurastrum aristiferum Ralfs. 

 Staurastrum brachiatum Ralfs. 

 Staurastrum brevispinum Breb. 

 Staurastrum dejectum Breb. 

 Staurastrum hirsutum (Ehrb.) Breb. 

 Staurastru?n polymorphism Breb. 

 Staurastrum ptinctulatum Breb. 

 Staurastrum Sebaldi Reinsch. 

 Xanthidium cristatum Breb. 



MESOTAENIACEAE. 



Closterium Dianae Ehrb. 

 Closterium Ehrenbergii Menegh. 

 Closterium gracile Ehrb. 

 Closterium striolatum, Ehrb. 

 Closterium rostratum Ehrb. 

 Docidium crenulatum (Ehrb.) Rab. 

 Pleurotaenium Ehrenbergii (Ehrb.) Naeg. 

 Closterium Lunula (Muell.) Ehrb. 



VII.— CHLOROPHYCEAE.* 



BOTRYDIACEAE. 



Botrydium granulatum (L.) Grev. Meadows south of lakes, 



C. S. H.— N. M. G. 



BRYOPSIDACEAE. 



Bryopsis plumosa (Huds.) Agardh. Occasional on rocks and 



wharves at month of harbor, C. S. H. — D. S. J. 

 CJiaetoynorpha aerea (Dillw.) Kuetz. Bottom of harbor, C. 



S. H.— D. S. J. 

 Chaetomorpha aerea forma linum (Fl. Dan.) Collins. Inner 



Harbor near sandspit, C. S. H. — N. M. G. 

 Rhizoclonium riparium (Roth) Harvey. Stones, mats, on 



Spartina, in brookish water, C. S. H. — H. H. Y. 

 Rhizoclonium tortuosum Kuetz. Mats and tangles on mud. 



brackish water, C. S. H.— D. S. J. and H. H. Y. 

 Rhizoclonium sp. Two species, old pier, mud, C. S. H. — 



D. S. J. 



—54— 



