7 
Ontario 
(38) Chaffey Township, Con . X, Lot 20, Muskoka County 
Gritty, white diatomite, 6 inches to 1 foot thick, lies beneath 1 foot 
of peaty soil in a small swamp. 
(39) Stisted Township, Con. XII, Lot 19, Muskoka County 
Impure (mud and peat) diatomite, 1 to 6 feet thick, occurs along 
the shore of a small lake. 
(40) Medora Township, Con. IV, Lot 19, Muskoka County 
Grey-brown diatomite, 3 to 5 feet thick, covered by a few inches of 
mud, occupies 6 acres of the bottom of a small bay in the south shore of 
Joseph lake. 
(41) Moon River, Con. D II, Medora Township, Muskoka County 
About 1 foot of white diatomite lying in a small bay on the river. 
(42) McKay Lake, Gloucester Township, Carleton County 
A sample of fossil marl which occurs 15 feet above the level of McKay 
lake at Ottawa was examined for diatoms, but none was found. E. J. Whit- 
taker, 1 has described the “Bottom Deposits” of this lake where he found 
a “reddish jelly or ooze” occurring at depths of about 30 feet, in the deepest 
part of the lake. A sample of this bottom mud, collected in midwinter, 
1925, and sent to the writer for examination by E. M. Kindle, is rich in 
the number of species of diatoms. It is evidently of comparatively recent 
origin and differs from other deposits of Canada chiefly in the rareness 
of Pinnularia and Eunotia. A notable occurrence is that of Mastogloia 
dansei Thw., usually existing in brackish water. 
British Columbia 
(43) Oldfield’s Farm, North End of Prospect Lake, Lake District, Vancouver 
Island 
White diatomite, 2 feet thick and covered by 6 inches of soil, lies on 
both sides of a small stream in a wide valley. 
(44) Near Cobble Hill, Vancouver Island 
About 1 foot of white diatomite beneath 1 foot of peat, near stream 
in a wide valley. 
(45) H assets Farm, Quamichan Lake, Vancouver Island 
Grey diatomite, 1 to 2 feet thick and covered by 6 inches of soil, 
occurs on gently rising, somewhat marshy, ground, bordering the lake. 
‘Whittaker, E. J.: Trans. Roy. Soc., Can., 1922. 
23753—2 
