IT is that department of natural history which treats of testaceous animals

IT is that department of natural history which treats of testaceous animals. In the Linnæan arrangement it constitutes the third order of the class of Vermes. This is the order testacea, of which we propose to lay

before our readers a pretty full view in the present treatise. The peculiarity and extent of this order of animals have induced us to consider it in a separate treatise, by which means we shall avoid swelling out to