160 '" MARINE AND FISHERIES 



5 GEORGE v., A, 1915 



Cambarus limosus (Raf.) Figs. 8,c; 9,c; 10,c; 12, d. 



C. ajffinis. Hagen, p. 60; Faxen, p. 86. 



C. limosus Ortmann, p. 107. 



This appears to be one of the commonest and largest species of the eastern 

 United States and is the one usually sold in the markets, according to Faxon. Ac- 

 cording to Abbott it is mostly found in the rivers under flat stones in deep water. 



<x> 



c a e 



Fig. 12. 



*&■• 



Localities.* — Lake Superior (Faxon). 



Lake Superior and Niagara (Hagen). 



Iroquois, Ontario (C). 



Length up to 120 mm. Areola of moderate width, about 1/12 width of body. 

 Rostrum with well developed lateral spines and a rather long narrow tip. Numer- 

 ous spines on sides of carapace, chiefly in front of cervical groove and along its 

 posterior margin. First abdominal appendages of the first form of male with 

 tapering tips, the extremities being bent away from each other. Annulus ven- 

 tralis of female with a transverse sinus behind and two projections in front, one 

 on either side of a median depression. 



Cambarus propinquus Girard. Figs. 8,a; 9,a; 10,a; 12,b; 13, a. 



Hagen, p. 67; Faxon, p. 91; Ortmann, p. 112. 



This is our smallest species. It is generally distributed over the whole region. 

 On the whole it keeps nearer to the shore than the other open water species and is 

 at times found in quite stagnant water (small inland lakes along shore of Georgian 

 Bay). 



Localities. — Lake Superior (Hagen): St. Mary's River, Heyden, Search- 

 mont (Williamson). 



Georgian Bay: Sturgeon Bay, McCoy Id., Shawanaga, Bustard Ids., French 

 River, Killarney, Tamarac Bay (Manitoulin Id.), Fitzwilliam Id. (Wo); Go Home, 

 Santa Gre, Shawanaga, Tamarac Bay (R); Collingwood, Go Home (Wa). 



Walkerton (I. A. Sinclair), Grant River (Brant Co.), Welland River 

 (C. 0. E. Kister). 



* Ortmann considers that the records of Faxon and Hagen are incorrect, and that this 

 spe cies does not occur in the lake region. I did not myself collect the Iroquois specimens. 



