308 



LAND AND FRESH-WATER SHELLS OF N. A. [PART I. 



Fig. 545. 



below, quite near the edge, the border of the mantle is readily distin- 

 guished, most of the under surface is occupied by the broad, 

 distinct locomotive disk ; the body is iiniformly smoke- 

 colored ; in size the individuals vary considerably, the 

 length of the largest being 5, the extreme breadth 3 mill. 



Oncliidium carpenter!, \V. G. Bixney, Proc. Acad. JXat. Sci. 

 Philad. 1860, 154. 



Oncliidium 



car2jenferi, 

 enlarired. 



Fig. 545 is drawn from one of the specimens col- 

 lected at Cape San Lucas. They were too much 

 dried to permit of anything more satisfactory. 



[This completes the series of North American land snails. 

 The fluviatile and marine genera will be found in Land and 

 Fresh- Water Shells of North America, Part IL] 



