It is almost impossible to review a book of this type from galley proof, minus the illustrations, in half tone and in full color, which for the average collector is the chief charm of a guide. This is a companion volume to Morris's Field Guide to the Shells of Our Atlantic and Gulf Coasts and will no doubt be for collectors on the Pacific Coast the ""bible"" that the earlier book has become for collectors in the east. The new book incorporates the beach names in the initial text, which was not done until the second edition of the earlier book. This enhances its popular value; its value for scientific collectors is unquestionable. To an easterner and an enthusiast, the similarity of the shells on the two coasts strikes one more than the differences. But a comprehensive guide indicating those shells characteristic of the Pacific Coast has long been needed. And the Hawaiian areas now receive their due attention.