The distribution and reactions of the land snails in the vicinity of Columbia Missouri

Text from page 3: "Introduction: The following study was undertaken at the suggestion of Dr.G .S .Dodds, ,with the intent of discovering the factors which determine the distribution of a group of our local fauna, the land gastropods. This group has been a favorite object of study with naturalists for the past century, and a great mass of literature exists on isolated collections made the country over. In Missouri a certain amount of collecting has been done, probably exhausting largely the possibilities so far as species are concerned. However, some interesting additions to our knowle[d]ge of the regional distribution have been ad1ed in the course of the present study, as will be noted later. Greger (1905) has made extensive collections in Callaway County, Pilsbfy and Ferris (1S06) in the Ozark Region, and Sampson (1913) over most of the State. There are besides, more general collections, as those of Binney (1885), in which mention is made of Missouri shells. Heretofore no attempt has been made to correlate the information scattered. Thru these papers, or to study the distribution from an ecological standpoint, and there has not been an intensive study of a single region in Missouri."