THE volumes of the “Traité de Zoologie Concrète” already published are so well known and have been so acceptable to zoologists that the present volume, dealing with the Cœlenterata, scarcely requires ...
THESE four parts complete the second volume of the “Handbuch der Zoologie”. The fifteenth and seventeenth, about 230 pp., are devoted to an excellent account of the Hirudinea which is commendable for ...
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