MOLLUSCA OF MICHIGAN— WALKER. 467 



Var. ALBA Witter. 



Helix multilineata alba, Witter, Quar Jour. Con., I., 384, (1878). 



Mesodon , Currier, Shell-bearing Moll. Mich., 5, (1868). 



, DeCamp, Shell-bearing Moll. Mich., 6, (1881). 



Polygyra , Walker, Rev. Moll. Fauna Mich., 16, (1894). 



Unicolored, pale horn-color without bands. 



Var. RUBRA Witter. 



Helix multilineata rubra, Witter, Quar. Jour. Con., I., 384, (1878). 



Mesodon unicolor. Currier, Shell-bearing Moll. Mich., 5, (1868). 



, DeCamp, Shell-bearing Moll. Mich., 6, (1881). 



Polygyra — , Walker, Rev. Moll. Fauna Mich., 16, (1894). 



Unicolored, deep reddish brown or chestnut. 



Abundant south of the Saginaw-Grand valley. North of that it has been 

 reported only from Benzie and Osceola counties. It also occurs in Menomi- 

 nee county in the upper peninsula. The varieties occur occasionally asso- 

 ciated with the typical form, although var. rubra has not yet been reported 

 from the eastern part of the state. 



A peculiar color-form, deep brown or chestnut color Avith a yellowish band 

 of variable width and position between the periphery and umbilical depres- 

 sion has been found in Kent county. 



-f POLYGYRA PALLIATA (Say). 



Shell imperforate, thin, depressed; light to dark brown or 

 chestnut color, and rough with minute, acute, projections and 

 stiff hairs; whorls 5, flattened above and rounded below, 

 with numerous fine oblique striae; aperture trilobate, much 

 contracted by the peristome and teeth; peristome white, 

 widely reflected, with two projecting teeth on the inner mar- 

 ^^^" ■^(Binnejo"^"'"' gin, the Upper one acute and prominent, the basal tooth long, 

 lamellar; parietal wall with a very prominent, white, curved tooth. 



Alt. 10, greater cliam. 21, lesser 18 mm. 

 Helix palliata, Say, Jour. A. N. S. P., II., 152, (1821). 



Triodopsis , W. G. Binney, Man. Am. Land Shells, 284, fig. 303, (1885). 



Helix , Sager, Doc. H. Rep. Mich. 1839, 420, separate, 14. 



, Miles, Rep. Geol. Surv. Mich., 236, (1861). 



Xolotrema , Currier, Shell-bearing Moll. Mich., 5, (1868). 



, DeCamp, Shell-bearing Moll. Mich., 6, (1881). 



Polygyra , Walker, Rev. Moll. Fauna Mich., 17, (1894). 



Saginaw-Grand valley and southeastern part of the state. It will prob- 

 ably be found to have a general distribution through the entire southern 

 portion, although it has not been reported from any of the southwestern 

 counties. 



Currier lists a var. alba, but gives no description. It is not represented in 

 his collection now in the Kent Scientific Museum at Grand Rapids. DeCamp 

 also quotes it as being in his collection, but it was not there when the col- 

 lection came into my possession. It has not been found by any Michigan 

 collectors. 

 . 44 



