zoology, and would perhaps deem it a mere descriptive cata-
logue of the animal kingdom. As it is intended for a text-book, how- ever, he must be content to leave the remainder to the professional student of this branch of Natural Science, who will find it far more than the catalogue the uninitiated might imagine. After an account of the- generic physiological structure of each sub-kingdom, we have a further description of the differentiae which distinguish each class, and the specialities of the orders and genera are given in detail. The minute- neFa and accuracy with which our author has treated the physiological and structural part are deserving of the highest praise, and will be in- valuable in a text-book. The labours of the most distinguished naturalists, and their late researches, are embodied among the professor's own observations and the chemical changes and compounds of the various organic productions, form a distinctive feature of the work.
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