Aspace = mm = 10m. e 
AMK. & TAN, : 
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PLATE I. 
ASEXUAL RESTING SPORES OF COSMARIUM BIOCULATUM, BREB. 
Figures l-11. Stages of formation of restin re. 
Vegetative stage. 2-3. Separation of the para Jaca Henn ot 
jele. 4-6. ater stages of formation of spore from the vesicle. 7-11. 
Ful sate formed spore with empty semicells in various position in the surround- 
ing mucilage. 12. Cosmarium bioculatum , vegetative divisions. End 
view of vegetative stage. ame as 1, front view. b taurastrum 
ic, ph B. End view of s C. Formation of zygospore of 
urastrum poly pen. B reb. Side and end view of vege- 
UM stage. "E. Cosmarium botrytis, Menegh. F. Spirogyra tenuissima, 
(Hass.) Kütz. 
TM ole Ne de utem of Cosmarium bioculatum. 
Side View, W. 
Zygospore, Z. = 18.5u—24,. (Usual size, 18». diam.) 
