Diatoms from the Quill Lakes, Saskatchewan, and from 
Airdrie, Alberta 
Bye WwW: BAILEY, Pa: D:;* lL: D: 
Fredericton, N.B. 
The collections of Diatoms from the two localities named above are of 
exceptional interest, first from the fact that the lakes referred to are saline lakes 
and contain a number of species of marine types not previously found at points 
remote from the sea, and secondly, as showing that certain forms, previously 
referred to distinct genera, are in reality different aspects of a single genus and 
a single species. 
ite 
DIATOMS FROM QUILL LAKEs.° 
The lakes are two in number, viz., Big Quill Lake and Little Quill Lake, 
and are not widely separated from each other, being situated on the line of the 
Canadian Pacific Railway, near Kandahar, in the Province of Saskatchewan. 
Both are saline, receiving fresh water only from local drainage and having no 
outlet. The salinity in the larger lake is about one half that of sea water or 
1.65%, the bases present in the salt being, as in sea water, in order of relative 
abundance, sodium, magnesium, calcium and potassium. The salinity of the 
smaller lake is considerably less, and the amount of calcium is also much less. 
The larger lake is deeper than the other, with drainage from a smaller area 
coming into it, and in Spring remains frozen for a much longer period. Both 
lakes occupy simple depressions of the surface, without any distinct evidence of 
glacial origin. The collections were made by Dr. A. G. Huntsman, of Toronto 
University in 1920, and to him I am indebted for the foregoing particulars of the 
locality. 
Besides Diatoms, the waters of the Quill Lakes contain very large numbers of 
Copepods and other Crustacea, as well as Infusoria and fresh water Algae. 
The Diatoms are very numerous, as indicated by the lists which follow, these 
being based mainly upon observations made by the writer and Dr. A. H. MacKay 
of Halifax, N.S., but supplemented by a few afforded by Mr. H. C. Wheeler 
of Montreal, Mr. Oliver Kendall, Jr., of Providence, R.I., and Mr. Chas. S. 
Boyer of Philadelphia. For the measurements of species I am wholly indebted 
to the labour of Dr. MacKay. 
The most interesting feature connected with these collections is that, though 
found so far inland, they contain not less than six genera or species which are 
usually regarded as wholly marine. These are the following: 
“- Amphiprora ornata—Bail. 
Chaetoceras. 
Pleurosigma elongaium. 
Thalasstothrix nitzschioides. 
Cocconets scutellum? 
Surtrella striatula, or a closely related species, S. Batleyana. 
S. ovalis, Breb. with its varieties, ovata and Brightwellit. 
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