88 Rhodora [May 
the axis, and as a forma should be known as O. VULGATUM f. ARENA- 
rium (E. G. Britton) Clute, Our Ferns in their Haunts, 316 (1901). 
O. arenarium E. G. Britton, Bull. Torr. Club, xxiv. 555, pl. (1897.) 
O. vulgatum var. minus Moore, Ferns Gt. Brit. and Ireland, t. 51B3 
(1857). O. vulgatum var. microstichum Moore, Octavo Nat. Pr. Brit. 
Ferns, ii. 336 (1859). O. microstichum Acharius (1809), fide Moore 
lc. 0. Grayi Beck, Bot. N. and Mid. St. 458 (1833). It is repre- 
sented from North America in the Gray Herbarium only from New 
York and New Jersey. 
STOUGHTON, MASSACHUSETTS. 
gi 
Y NOTES ON THE ALGAE OF GEORGIAN BAY. 
A. B. Kiuan, M. A. 
DurinG the latter part of August and the first three weeks of 
September, 1912, I was engaged in an investigation of the Algae of 
Georgian Bay, Ontario. The work was done in connection with the 
Biological Station, Go-Home Bay, Muskoka. 
From August 17 to 19 was spent at the Station. On August 20th 
I started on a trip round Georgian Bay in company with Mr. A. D. 
Robertson in a motor-boat. We carried a tent and camp outfit, and 
spent from one to four days at the following points:— Waubaushene; 
Shawanaga, Parry Sound District; French River, Nipissing District; 
Killarney, Algoma District; Big Burnt Island; Wekwemikongsing 
Manitoulin; Rattlesnake Harbour, Fitzwilliam Island; Tobermory; 
MacGregor’s Harbour, Bruce Peninsula; and Collingwood. From 
these points short runs were made each day for collecting. 
It will be noticed that the number of species of Chlorophyceae re- 
ported is small; this being due to the lateness of the season as most of 
the Chlorophyceae are vernal plants, and even if they have not com- 
pletely disappeared by midsummer they are only in a vegetative con- 
` dition and not recognizable with certainty. The genera Spirogyra, 
Zygnema, and Oedogonium were present in many collections but none 
were in fruit. 
