Hydroids of the Pacific Coast of Canada and the United States

Hydroids of the Pacific Coast of Canada and the United States is an attempt to give a brief description, with figures, of every hydroid species known to occur along the Pacific Coast of Canada and the United States, together with its distribution within this area. It is intended to provide the Pacific zoologist with a reference, easily understood, to every species of hydroid reported from the coast. Keys to families, genera, and species have been included to facilitate diagnosis. Much of the inf