2 University of Michigan 



la Famille des Limaciens, 1855, p. 8), who lists Arion empiri- 

 corum Fer., a synonym, from the "Western States."' W. G. 

 Binney (Man. Am. L. Shells, 1885, p. 463) says that Grate- 

 loup's quotation is "without authority or description," and 

 Taylor, in his recent Mon. Brit. L. and F. W. Shells, II, 1905, 

 p. 192, states that Grateloup's citation "is not confirmed by 

 more recent authors." 



The Detroit specimen was, in life, wholly of an old-rose 

 color and with its ydlow and black foot-fringe was a striking 

 and beautiful object. Unfortunately the color has entirely 

 faded out since it was placed in alcohol. It would seem to 

 group under the var. riifa L. as defined by Taylor (/. c), but 

 it was far from being of the deep red color figured for the 

 subvar. rubra. 



Mr. Cowles also informed me that the year before he had 

 seen a dark colored slug of the same size in his garden, which 

 would tend to show that the species had survived at least one 

 winter in that locality. Unfortunately the most strenuous 

 "hunting" failed to discover any additional specimens, and, 

 as he moved away the following year, the specimen remains 

 unique. It is now in the Museum of Zoology of the Univer- 

 sity of Michigan. 



2. Arion circnmscriptus Johns. — On April 12, 1913, Mr. 

 Harold Cummins, then a student in the University, collected 

 a number of this species under boards and other debris around 

 the "Cat Hole," a well-known sink-hole near Ann Arbor. The 

 specimens then sent to me are now in the Museum of Zoology. 



This species seems to be rapidly extending its range west- 

 ward. Taylor (/. c, p. 239), states that in 1904 it was found 

 abundant at Niagara Falls, New York, by T. D. A. Cockerell. 

 Robertson (Nat. Hist. Toronto Region, 1913, p. 290) records 

 it from Toronto, Ontario. And in October, 191 7, specimens 



