This reference work is designed to provide background information on an array of northeastern Pacific marine invertebrate species so that they can be more easily included in comparative studies of morphology, cell biology, reproduction, embryology, larval biology, and ecology. It is meant to serve biologists who are new to the field as well as experienced investigators who may not be familiar with the invertebrate fauna of the northern Pacific Coast. The species discussed in this volume are mostly from the cold temperate waters of the San Juan Archipelago, near Puget SOund and the Strait of Georgia, but the information and methods given will be useful in laboratories from Alaska to central California and applicable to some extend in other coastal or inland facilities. An introductory chapter discusses basic prodcedures for collecting and maintaining mature specimens, for initiating spawning, and for culturing embryos and larvae in the laboratory. Subsequent chapters summarize reproduction and development in thirty different invertebrate groups and provided ercent references through which additional information can be traced, cite monographs or keys needed to identify species, and give methods useful for studying an array of selected species. Available information on habitat, diet, reproductive mode, egg size, developmental pattern, developmental times, larval type, and conditions for settlement and metamorphosis is reported for over 450 species.

"An immensely useful manual with many attractive features: comprehensive and lucid keys, precise diagrams, annotated checklists and up-to-date references. ... there is no doubt that it should be seen as an example of the type of manual which is so badly needed in the study of the fauna of many shores around the world."--Journal of Animal Ecology "Congratulations to the editors, contributors, and publisher for a job well done. The third edition has been rewritten, corrected, and enlarged, so that while retaining the basic organization of the earlier ones, it is more useful, informative and up-to-date. The meticulous scholarship of Smith and Carlton is just what the revision needed."--Systematic Zoology "This revision should serve for many years. It is therefore particularly commendable that the editing has been meticulous, perhaps flawless. ... thanks are due to the many contributors for a job well done."--The Quarterly Review of Biology "As the Pacific Coast intertidal zone undergoes increasingly profound changes, knowing the sentinel invertebrates can foretell the future of the sea, and hence, of our species. Jim Carlton's hefty new update of The Light & Smith Manual, the comprehensive compendium of who's who between the tides, is the best and quickest way to do so."--Elliot A. Norse, President, Marine Conservation Biology Institute "This much-anticipated modernization of "Light's Manual" is an astonishing accomplishment, blending state-of-the-art taxonomy with profusely illustrated and user-friendly keys to who's whom on marine shores from its stated boundaries of mid-California through Oregon, and clearly, much further north. It's also an informative, well referenced read. Marine biologists should not leave home without it."--Robert Paine, Professor Emeritus of Biology, University of Washington "At this time of environmental change and loss of biodiversity, species identification has never been more important. The fourth edition of Light and Smith is more than just a field guide--it is a masterwork of research and description with a strong focus on morphological detail. No other book has such a broad scope, newly expanded to include even the most obscure taxa. The revised keys and beautiful anatomical illustrations make this classic guide more indispensable than ever. As taxonomists become extinct, there are fewer students to receive the vast body of knowledge accumulated by generations of careful study. I hope that the beauty and depth of this guide will inspire a generation of young scientists to continue this critical taxonomic work. It will have a place of honor in all marine labs."--Paul K. Dayton, Scripps Institution of Oceanography