A descriptive catalog of the Mollusca of Utah

In the preparation of this bulletin an effort has been made to bring together what was previously known of recent Utah mollusks and to incorporate with this the results of the authors' special studies. The form of presentation has been determined by the fact that, in the first place, the paper is intended to serve as a basis for further scientific work and, in the second place, to serve as a reference text for teachers of zoology in Utah colleges and high schools and as an aid to amateur collectors. The article is based primarily upon a study of upward of one thousand sets of shells collected during the year 1927 and a lesser number collected during 1928, all of which are now deposited in the Zoological Museum o.f the University of Utah.