24 DR. б. S. WEST ON THE ALGÆ OF 
Oct. Tth, 1905.—А few Chlorophyceæ had made their appearance, mostly 
Desmidiaceæ. А few of the smaller Desmids were not uncommon, and 
Cosmarium amenum var. mediolwve was conspicuous. Filaments (sterile) of 
a small species of Mougeotia were not infrequent. A few Diatoms were fairly 
general, and Vanheurckia viridula was abundant. 
Nov. 4th, 1905.— The littoral Alga-flora very rich. Five species of Oedo- 
gonium and one of Bulbochete with ripe oospores. Zygnema spontaneum and 
five species of Mougeotia in fruiting condition, of which M. suberassa and 
M. victoriensis are interesting new species. Spirogyra gracilis in conjugation. 
Protocoecoidez represented by a multitude of small species. Also a vast 
number of very small species of Desmids, of which Cosmarium capitulum var. 
australe, C. quadratulum, and Staurastrum bibrachiatum var. сутайит were 
particularly conspicuous. Diatoms numerous, but species relatively few. 
Пес. 2nd, 1905.—Three species of Oedogonium and one of Bulbochete were 
in a fruiting condition. Large quantities of sterile filaments of Zygnema 
spontaneum, and a few with zygospores, were observed. Intermingled with 
the Zygnema were fruiting specimens of Mougeotia suberassa and Spirogyra 
gracilis. Small species of Desmids were very numerous, and one specimen 
of Micrasterias Hardyi was observed. There were a number of Protococ- 
coidez, of which Glwocystis gigas was the most conspicuous, while species of 
Scenedesmus and Calastrum sphericwum were fairly general. The con- 
spicuous Diatoms were Tabellaria flocculosa, Vanheurckia viridula, and 
Synedra Acus.  Dinobryon cylindricum (with its var. divergens) was abun- 
dant, and Trachelomonas hispida was not uncommon. The dominant feature 
was the enormous abundance of the smaller species of Desmids. 
Jan. 6th, 1906.—The amount of Zygnema, Mougeotia, and Oedogonium 
greatly diminished. The most interesting Conjugate was Debarya Hardyi 
in all stages up to the formation of ripe zygospores. The smaller species of 
Desmids were still abundant, although not quite so numerous as in the 
preceding month. Gonatozygon monotænium was conspicuously abundant. 
One specimen of Micrasterias Hardyi was again observed. Of the Protococ- 
coïdeæ, Ankistrodesmus and Scenedesmus were the most frequent. There was 
a considerable increase in the number of Diatoms, more especially in indi- 
viduals. The species of Diatoms were few, Synedra Ulna and Tabellaria 
flocculosa being the most conspicuous. The dominant features were the two 
Diatoms just mentioned and the numerous small species of Desmids. Many 
species of Cosmarium (especially C. obsoletum) and the zygospores of 
Spirogyra gracilis were attacked by Myzocytium proliferum, Schenk, one of 
the Chytridiaceæ. 
