THE MOLL USC A OF MUSCATTNE COUNTY. 7 



H. thyroides, SAY. Very rare in Muscatine County or in Iowa, 

 so far as we know. Judging from dead shells, it was quite 

 abundant, not long ago, at Wyoming Hills, eight miles east 

 of Muscatine. Live shells are very rare there now, it being 

 the only place where the species is found in Iowa in this 

 region. Common two miles above Drury's Landing, along 

 foot of sandstone bluffs. Greatest diam., 26.6 ; least, 22.2 ; 

 height, 15 mm. 



H. clausa, SAY. Very rare in this region. Both dead and live 

 shells have been found in nearly all our deep ravines. Very 

 abundant three miles north of DCS Moines, along with albola- 

 bris, prof undo, , and alter nata. The largest and smallest 

 mature specimens found here measure as follows : greatest 

 diam., 19.4, 15.6; least, 15.4, 13; height, 12.2, 9.8 mm., 

 respectively. 



H. profunda, SAY. Has not been found in this vicinity in Iowa. 

 Occurs at Gooseberry Point, two miles above Drury's Land- 

 ing, and near Des Moines. At all of these places it is rare. 

 A white variety is common among the specimens found. 

 White variety, greatest diam., 29.4; least, 25; height, 14 

 mm. Banded variety, greatest diam., 29.4; least, 24.8; 

 height, 15 mm. 



H. pulchella, MULL. Common, in Mr. J. Stockdale's yard in 

 Muscatine, the only place where we have found it alive. It 

 is common in the loess of this city, and we have live speci- 

 mens of the variety costata from Davenport. Those from the 

 loess are somewhat costate, live shells from Mr. Stockdale's 

 3~ard are the true pulchella, and those from Davenport are 

 conspicuously costate. They differ greatly in size. Loess, 

 greatest diam., 3 mm. ; Stockdale's, 2.4 mm. ; Davenport, 

 2 mm. 



LIMAX. 



L. campestris, BINNEY. Abundant about gardens. 



CIONELLA. 



C. subcylindrica, LINN. Rare. One mile north of Muscatine on 

 Chicago, Rock Island, and Pacific Railroad embankment ; 

 under vines in sandy loam. Has not been found elsewhere in 

 this county, and has not been reported from any other part of 



