] 
T 
a^ 
4 
198 E 
iW 
* Staurastrum margaritaceum (Ebrb.) Menegh. : 
— tetracerum .Ralfs. E 
Ee polymorphum Bréb. AT 
— gracile Ralfs. 
Z — quadrangulare Bréb. 
m — vestitum Ralfs. 
Xanthidium fasciculatum. Ehrb. 
Arthrodesmus Incus (Bréb.) Hass. 
B — convergens Ehrb. 
ui — subulatus Ktz. 
et in Àmerica boreali he 42*): 
Penium Digitus (Ehrb.) Bréb. 
— . minutum (Ralfs) Cleve. 
Closterium. striolatum Ehrb. 
Dal turgidum Ehrb. 
* 
— lineatum Ehrb. 
— moniliferum (Bory) Ehrbz | 
Tetmemorus granulatus Bréb. EEIA 
Docidium Baculum Bréb. Vari 
— modulosum Bréb. 
Spherozosma excavatum BRalfs. . i 
Hyalotheca dissiliens (Smith) Bréb. t.zd 
* Desmidium aptogonum Bréb. Aj ^ 
— quadrangulatum Ralfs, 
Cosmarium margaritiferum (Turp.) Mgnegh. 
— Boirytis (Bory) Menegh. 
— amoenum Bréb. 
— Cucumis Corda. 
— pyramidatum Bréb. 
— undulatum Corda. 
— ornatum Ralfs. 
— moniliforme (Turp.) Ralfs. 
Euastrum rostratum Ralfs, 
— binale (Turp.) Ralfs. 
