482 
RETIEWS. 
marine zoology will have no difficulty in referring such 
Polyzoa as he may dredge on the British coast to their 
proper titles. Naturalists are already deeply indebted to 
Mr. Hincks for his beautiful volumes (in the same series) 
on the British Hydroid Polyps. In the present work he 
has dealt in a masterly way with a still more difficult group. 
We hope that other similar works may ere long be added to 
Mr. Van Voorst’s celebrated series. 
