WITH the appearance of this volume we have the W pleasure of congratulating the author on the completion of a very heavy task. As we have had occasion to remark in our notices of the two earlier volumes, from the point of view of pictorial illustration the work is in the main all that can be desired, and there is little doubt that in this respect it will long remain absolutely without a rival. Our very heartiest congratulations may accordingly be tendered to Mr. Millais and his fellow artists on the result of their endeavours to illustrate in an adequate and exhaustive manner the living and recently exterminated mammals of the British Isles. In giving as the frontispiece of the present volume a picture of a southern right-whale attacked by a party of gram. puses, or killers, it may possibly be objected that the. author has introduced a scene which cannot now be witnessed in British waters. Since, however, the past as well as the present state of the fauna of our islands. enters into the purview of the work, there may be justification for such an illustration; and even if this be not the case, the privileges of artistic license may be pleaded as sufficient excuse. Had space been available, we should have had much pleasure in reproducing one of the full-page illustrations which form by far the most striking feature of the work. Failing this, we have to be content in presenting to our readers (by the courtesy of the publishers) three of the smaller illustrations as examples of the pictorial merit of the work.