Excerpt from Variations and Relationships in the Snakes of the Genus Pituophis I am greatly indebted for assistance to several individuals and institutions. In addition to the collection of specimens in the Museum of Zoology of the University of Michigan, which served as a nucleus for the work, I have had access to the collections of many museums and universities and to the private collections of several individuals. Often single specimens proved of unusual value; some by showing an extreme variation, others by contributing a new locality record. Every additional specimen, even though it possess no unusual features, is an important contribution in swelling the numbers necessary for accurate interpretation of individual, sexual, and geographic variation. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.