The plankton algae and protozoa of Lake Erie have been studied 

 in greater detail than those of the other lakes, Kellicott (I878) 

 noted the seasonal dn .^tribution of a number of algae in the water supply 

 of Buffalo, Mills (1882) studied the forns from the same source, and 

 took saiT5)les from Niagara River also, Vorce (I880) noted the changes 

 in the kinds and abundance of diatoms in the water supply of Cleveland 

 throughout the year. In later papers, (Vorce, I88I and 1882), he list- 

 ed and illustrated a large number of forms from the water supply. Some 

 years later the algae at the west end of the lake were studied in con- 

 siderable detail by Pieters (1901), Riddle (1902), and Snow (1903). 

 Jennings (1900), Landacre (1908), Walton (I9l5), and Stehle (1923) 

 studied the proto7oans of the same region, Burkholder (1929a) listed 

 the algae, protozoa, and rotifers of eastern Lake Erie, Tiffany and 

 Ahlstrom (1931) described some new forms from the region of Put-in-Bay, 

 A more extended account of the algae of this region may be found in a 

 paper by Tiffany (1933). 



Papers on the algae and protozoa of Lake Michigan have been 

 written by Briggs (l872), Thomas and Chase (188?) , Thompson (I896), 

 Kofoid (1896), Leighton (1907), and Eddy (1927). Eddy's paper is especially 

 valuable because it contains reviews of the earlier papers. Apparently 

 there have been nc taxonomic studies of these groups in Lake Superior and 

 Lake Ontario. However, Burkholder and Tressler (1932) listed the genera 

 of algae taken in four bays near the outlet of Lake Ontario, Pieters 

 (I89I4) listed the algae of Lake St, Clair; Klugh (1913), MacClement (19l5), 

 and Bailey and Mackay (1921) listed those of Georgian Bay in Lake Huron, 



-Reighard (l893) was the first to make a quantitative study of 

 the plankton of the Great Lakes, In the spring of l893 he made a number 

 of collections with a horizontally hauled net in Lake Michigan and Detroit 

 Riv*r, The results need not be discussed here, but it may be mentioned 

 that he found very little plankton in Detroit River, 



In September of the same year Reighard and his associates made a 

 study of the plankton in Lake St. Clair and in the western part of Lake 

 Erie (Reighard, I89I; and l89lia). Samples were taken with a net of the 

 Hensen type, and the amount of plankton was determined voluraetrically. 

 Of the 21 plankton stations, three were in Lake Erie: two near the 

 islands and one some distance south and east of the mouth of Detroit 

 River. The mean volume of plankton in Lake St. Clair, expressed in cubic 

 centimeters per cubic meter of water, was 3.03. The mean volume for the 

 2 stations near the islands in Lake ^ie was 8,98 cubic centimeters per 

 cubic meter. Only l,lU cubic centimeters per cubic meter were found at the 

 station near the mouth of Detroit River, The general conclusions reached 

 by Reighard may be summarized briefly in his own words: "(1) The volume of 



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