Excerpt from Proceedings of the California Academy of Sciences, 1920, Vol. 10 As one proceeds south and east from the cool north coast region's toward the warm south coast and interior desert regions, the average counts gradually increase. Although the transition is gradual, these gastrostege counts are Of great use in the separation of these snakes into the two groups which we then regarded as two subspecies. 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.