NATURAL HISTORY, TORONTO REGION 
CHLOROPHYCEAE—Green Algae. 
Order Confervales (Heterocontae). 
Family Botrydiaceae. 
Botrydium granulatum, Grev.* Don Valley. 
Order Conjugales. 
Family Desmidiaceae. 
Fifty-six species are listed by Mackenzie—all 
from Ashbridge’s Bay, High Park, Don Valley and 
Humber Valley. The genera represented are:— 
Hyalotheca (1 species), Desmidium (1), Penium 
(2), Closterium (12), Docidium (2), Calocylindrus 
(2), Cosmarium (19), Xanthidium (2), Arthrodes- 
mus (1), Euastrum (2), Micrasterias (1), Staura- 
strum (11). 
Family Zygnemaceae. 
Zygnema pectinatum, var. anomalum, Kirch. 
Spirogyra flavescens, Cleve. 
longata, Ke. 
¢ nitida, Link. 
e jugalis, Kg. 
orthospira, Kg. 
quadrata, Petit. 
“ 
Ts 
Family Mesocarpaceae. 
Mongeotia genuflexa, Agardh. 
Order Volvocales. 
Family Chlamydomonadaceae. 
Chlamydomonas—undetermined species. 
Haematococeus pluvialis, Agardh. 
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