THE NAUTILUS. 35 



P. vinosa Gld. Originally described from specimens collected on 

 the north shore of Lake Superior, this species has been cited by 

 Miles, Currier, Smith and De Camp without further knowledge of 

 its occurrence. Recently, however, specimens from the Detroit 

 River and St. Clair Flats have been referred to this form by Mr. 

 R. E. C. Stearns, of the U. S. Nat. Museum. 



P. anatina Lea. Although not cited from the western part of 

 the state, its occurrence in Washtenaw, Macomb, Lapeer and 

 Grand Traverse Counties show that it has a general distribution 

 through the eastern and northern part of the state, Mr. R. E. C. 

 Stearns, S2:)eaking of specimens from the Clinton River, Macomb 

 County says: "Your specimens are the brightest and handsomest I 

 have seen." 



P. pomilia Con. Cited by De Camp as var. Shoivalteri Lea. I 

 am indebted to Mr. Streng for specimens from Grand Rapids. 



P. gyrina Say. Very abundant and in great variety of form. 



P. gyrina hildrethiana Lea. Very common everywhere. 



P. elliptica Lea. Cited by De Camp, as are also P. oleacea Tryon 

 and Fehigeri Lea, which are considered as synonyms by Tryon. 



P. heterostropha Say. Common everywhere and in almost infi- 

 nite variety. 



P. brevispira Lea. Specimens from the Detroit River have been 

 identified as this species by Mr. Pilsbry. 



P. dejormis Currier. This species, originally described from 

 Grand Rapids, is cited also by De Camp in his catalogue. Dr. De 

 Camp writes : " I do not believe that this is a distinct species." 



Aplexa hypnorwn L. Common everywhere. 



A. hypnorum tryoni Currier. Distinguished by its larger size and 

 deeper coloring. 



A. Integra Hald. Generally distributed through the state and 

 quite common. I follow Tryon in including Lea's P. niagarensis 

 as a synonym. Mr. R. E. C. Stearns, however, informs me that 

 our Michigan species is niagarensis and that Haldeman's integra is a 

 southern species not extending further north than Indiana. The 

 Michigan form agrees, however, with specimens received as P. 

 integra from the late Dr. Jas. Lewis. 



To be cone hided. 



