Book excerpt: Excerpt from Annotated Checklist of the Marine Mammals of the Gulf of California Walker er al. (1986) studied 152 skulls from the eastern North Pacific (6 from Baja California waters north of N, 112 from southern California waters, 32 - 37 N, and 34 from north of 37 N), finding modal differences between animals from the extreme north ern (above 37 N) and extreme southern (below 32 N) portions of the area. Vidal (1991) documented the existence of osteological materials from eight specimens from western Baja California (norte) and 15 from western Baja California Sur (the southernmost from Isla Magdalena, about latitude N). These specimens have not been studied in detail. To date, no osteological materials have been collected in the Gulf. 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.