Reprint of the original, first published in 1872. The publishing house Anatiposi publishes historical books as reprints. Due to their age, these books may have missing pages or inferior quality. Our aim is to preserve these books and make them available to the public so that they do not get lost.

Polychaetes are very common marine worms belonging to the Annelid family that are of interest to marine biologists and invertebrate zoologists. The book presents an understanding of the biology of this group with many illustrations.

The culmination of a ten-year study, Bivalve Seashells of Western North America treats all bivalve mollusks living from northern Baja California, Mexico to Arctic Alaska. A total of 472 species are described and illustrated with detailed photographs and drawings. All habitats in the region are included from the intertidal splash zone to the abyssal depths of the ocean basins. The book has over 4,800 complete bibliographic references to the bivalves, including citations on the biology, physiology, ecology, and taxonomy of this commercially and biologically important group. Character tables and dichotomous keys assist the reader in identification. Also included in the 764 page book is an illustrated key to the superfamiles of the region, and a complete glossary.