4 JOURNAL OF THH 



Cosmarium Braunii. Forma major, Reinsch. 21 micros. 



Tetmemorus Isevis, Ralfs. (?) 



Xanthidium fasicu latum, Ralfs. Var. hexagonum, Wolle. 



Euastrum verrucosum, Ralfs. 



Euastrum verrucosum. Var. alatum, Wolle. 



Euastrum verrucosum. Var. reductuin, Nordstedt. (?) 



Euastrum piuuatum, Ralfs. 



Euastrum elegans, Kuetzing. 



Euastrum binale, Ralfs. 



Euastrum oblongum, Ralfs. si micros. 



Euastrum ausatum, Ralfs. Var. major, Wolle. 



Euastrum ilierme, Luudell. Does not quite agree with Wolle's figure: 



the second erena on basal lobe is not so near end lobe. 



Micrasterias Americana, Kuetzing. 



Micrasterias laticeps, Nordstedt. 



Micrasterias denticulata, Ralfs. 



Micrasterias crenata, Ralfs. 



Micrasterias decemdentata, Naegeli. si micros. 



Micrasterias rotata, Ralfs. 



Micrasterias conferta, Luudell. 



Micrasterias ftircata, Ralfs. (?) 105 micros. 



Micrasterias Rabenhorstii, Kirchner. (?) ks micros. 



Micrasterias fimbriata, Ralfs. (?) Agrees with Wolle's text and figure, 



except that it is much too small. 



Staurastrum orbiculare, Ralfs; 

 Staurastrum hirsutum, Ralfs. 

 Staurastrum echinatum, Brebisson. 

 Staurastrum spongiosum, Brebisson. 

 Staurastrum botrophilum, Wolle. 



Staurastrum pygmseum, Brebisson. Forma genuina, Brebis- 

 son. 



Staurastrum pygmseum. Forma truncata, Wolle. 

 Staurastrum pygmaeum. Forma rhomboides, Wolle. 

 Staurastrum artiscon, Brebisson. 

 Staurastrum dilaratum, Ehrenberg. (?) 

 Staurastrum cyrtocerum, Brebisson. 



Wake Forest College, .May 2, 1888. 



