132 ORTMANN — AFFINITIES OF CAMBARUS. 



[April 13 , 



again gives Niagara ( " there is no doubt of the correctness of the 

 determination" ), and Lake Erie (Peabody Ac. Sci.). In 1890, 

 Faxon says of the latter specimens, that they "are too small to 

 determine with certainty." He further gives, in 1885, Lake Su- 

 perior (Boston Soc. Nat. Hist.). I do not entertain the slightest 

 doubt that all these localities are wrong. As to Niagara, which is 

 founded upon the authority of L. Agassiz, we only have to con- 

 sider that the same locality upon the same authority is given also 

 for C. propinquus, and it is quite probable, that specimens of C. 

 limosus were put by mistake into a jar containing C. propinquus. 

 As to Lake Erie and Lake Superior, some other species may be in- 

 tended, or a similar mistake has been made : I do not believe, 

 most emphatically, that this species is found in the lake-region. 

 With regard to the absence of C. limosus in the state of New York, 

 we possess the testimony of De Kay (Zool. N. Y. , 6, 1844, p. 

 23) : "I have searched for it {Astacus affinis') without success in 

 the tributaries of that stream (Delaware) within the limits of this 

 State." 



C. propinquus Gir. 



New Localities. — Lake Erie, Lorain Co., Ohio, Lorain gill nets. 

 May 1, 1892, coll. by H. Warden (Mus. Oberlin). These speci- 

 mens from the lake are the true C. propinquus, while all other 

 specimens from the tributaries of the lake in Lorain Co., Ohio, 

 belong to propinquus sanborni, see below. Crooked Lake, Oden 

 near Petoskey, Emmet Co., Mich., coll. by E. B. Williamson, Sept. 

 1, 1904 (Cam. Mus.). This is the northernmost exact locality 

 known, and is very near to a locality recorded by Ward (Bull. 

 Mich. Fish Comm., 6, 1896, p. 15), but not recorded by Faxon, 

 namely: Lake Michigan and Pine Lake at Charlevoix, Charlevoix 

 Co., Mich. 



Doubtful Locality. — The latter localities in northern Michigan 

 render it possible that the old records of Lake Superior, given by 

 Hagen on the authority of L. Agassiz, may be correct. But since 

 to L. Agassiz also the record of C. rusticus and virilis for Lake 

 Superior are attributed, we have again several species mixed up, 

 and it is better to wait for a confirmation. 



C. propinquus sanborni Fax. 



New Localities. — Oberlin, Lorain Co., Ohio, is the type-locality 

 (Faxon) for this form. I have seen it (Mus. Oberlin) from the 



