THE ALGAE 
Oscillaria limosa, Agardh. 
Phormidium autumnale, Gomont. 
Family Nostocaceae. 
Nostoc ellipsosporum, Rab.* Toronto Island, on 
ground in marshy places. 
commune, Vauch. 
caeruleum, Lyng. 
pruniforme, Agardh.* Forming dark blue- 
green or blackish-green floating balls, 
sometimes as large as a small hen’s 
egg. Don Valley. 
Anabaena flos-aquae, Bréb. 
i azollae, Stras.* Greenhouse, in tissues 
of the little floating fern Azolla. 
Cylindrospermum stagnale, B. & F. 
it4 
“ 
ce 
Family Scytonemaceae. 
Tolypothrix lanata, Wart. 
Family Rivulariaceae. 
Calothrix fusca, B. & F. 
Rivularia dura, Roth. 
natans, Welwitsch.* 
DIATOMACEAE—Diatoms. 
Species of the following genera of diatoms have 
been reported by W. B. Tindall, Esq. : 
Stauroneis, Pinnularia, Navicula, Surirella, 
Meridion, Diatoma, Pleurosigma, Epithema, Gom- 
phonema, Cocconeis, Bacillaria. 
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