NOTES ON THE DISTRIBUTION OF SHELLS, NO, III. 551 



ZOOLOGY AND BOTANY. 



NOTES ON THE DISTRIBUTION OF SHELLS, NO. IIL 



F. A. Sampson, sedali^, mo. 



At one time I thought I had made a full list of the shelb found near Sedalia, 

 but having at different times, even down to the writing of this article, made ad- 

 ditions to the list, I would not claim that I now give all. For a time after com- 

 mencing to collect, I was unsuccessful in finding the small shells, and wrote to n, 

 friend that there were none in the county. He insisted that there were, and 

 gave some directions about how to hunt for them, after which I soon learned 

 how to fii d them, and at all suitable stations I now obtain several species, thougli 

 none of them are common to all stations which appear to be equally suited to 

 them. Of the three zonites which are most abundant, arboreus, viiidvlus and in- 

 deniaius, some one is generally plenty to the almost or wholly total exclusion of 

 the other two. 



The following will be of interest as showing the association of species, the 

 comparative number, as well as the actual number of each found in a search of 

 about one hour at each place. The first locality is in and close to an abandoned 

 stone-quarry a mile northwest of the city. It is surrounded by brush, but no 

 heavy woods, and is close by a small stream of water. The shells were all found 

 under stones. The second is southwest of Sedalia in the bottom on Flat Creek, 

 in an open place ill the woods. There being no rocks at this place the shells 

 were obtained under logs and sticks. No shells were found in the woods where 

 dense, but in an open space where the most of the timber had been cut down 

 and grass had grown up : 



The following list gives all that are now known to be in the county, but from 

 the fact that some have been found but at a single place, and at a single time, we 

 may expect further search to bring others to light : 



I. Macrocyclus concava, Say. — But few specimens have been found and 

 those are either of small size or else they are not full grown. ♦ 



