134 The Ohio Naturalist. [Vol. VII, No. 7, 



Ste. Marie) tend to confirm this old record, although it has yet to 

 be demonstrated that the species is found in Lake Superior 

 proper. 



2. Carnbanis virilis Hagen. Locality: Crooked Lake, Oden, 

 Emmett County, Michigan. 



Distribution: Abundant in the Mississippi and Missouri 

 drainage from northern Texas, Arkansas and Oklahoma, through 

 Kansas, Missouri, eastern Nebraska, Iowa and western Illinois 

 to Michigan and Minnesota. In the latter states, also in northern 

 Indiana, it is found in the drainage of the Great Lakes. In 

 northern Minnesota and north Dakota it has invaded the drain- 

 age of the Red River of the North, and goes through Winnipeg as 

 far north as Saskatchewan (Hagen). It is also found in eastern 

 Ontario, and the drainage of the lower lakes and the St. Lawrence, 

 but not on the United States side: Toronto (Faxon); Sandy 

 Lake, Peterborough County (Ortmann) and there is a fine series 

 of this species in the Carnegie Museum from the new locality: 

 Rideau River, Billings Bridge, Ottawa. This latter locality, 

 Emmett Co., Michigan, and Lake Superior in Minnesota (Her- 

 rick) mark the northern boundary of this species in the Lake 

 region. The absence of this species in the whole of the Ohio 

 drainage is remarkable. 



3. Cambarus bartonii (P.). Locality: Dam Creek, Search- 

 mont, Algoma District, Ontario, Canada (region of eastern end 

 of Lake Superior). 



The specimens at hand agree in all essential points with the 

 typical form of C. bartonii as found in Pennsylvania; and also 

 in minor points there is not the slightest difference ; there is no 

 approach whatever to C. bartonii robustus (Gir.). 



Distribution: C. bartonii belongs to the Appalachian Sys- 

 tem, ranging from Tennessee and North Carolina to Maine and 

 New Brunswick. Its northwestern boundary is formed by the 

 St. Lawrence River and the lower lakes, it never having been 

 reported, with one exception, to the north of this line. This 

 only exception is near Lake St. John, in Quebec, for to the 

 northeast of the range in the States of Ohio and Indiana this 

 species does not reach the Lake region and it has never been 

 found in any part of Ontario, Michigan and Wisconsin. 



Indeed Hagen gives, upon the authority of L. Agassiz: Lake 

 Superior, a record that has been dropped by Ortmann (Trans. 

 Am. Phil. Soc. 44 '05, p. 135). The present locality, however, 

 confirms this old record, at least in so far as this species is 

 positively found in the Lake Superior region. Nevertheless this 

 locality appears strange since it is so far remote from the rest of 

 the range, the nearest place, in western New York, being about 

 400 miles away. In the inter\-cning region in eastern Ontario, 



