158 The Mammalia of Essex; a Contribution towards a manner it may be useful, by directing attention to the various mammals remaining to us, especially as the class Mammalia is a branch of Natural History the study of which is almost entirely neglected in this country. Ask any countryman, or even any well-educated person living in the country, how many species of mice there are in Britain, and not one in ten thousand will be able to answer the question. Even amongst those paying some attention to Natural History, nearly the same ignorance prevails ; birds, butterflies, and moths, occupying their interest, generally to the exclusion of other and equally attractive subjects. it is not surprising that the beautiful branches of Natural History are attractive to amateur students, but why is it that the mammals are so neglected ? It may be that they are not found everywhere, as are butterflies and birds, and that they are more difficult to capture and preserve. On the other hand, these species are not so numerous, and any trouble and care expended on them will be quite as profitably employed as in the pursuit of more favoured creatures, for the study of Nature in her various forms is ever an unfailing source of pleasure to those whose minds are fortunately endowed with a taste for enquiry into her laws. "I am not vain enough to suppose that I can add much to the zoological knowledge which is yearly becoming more general amongst us. Yet it is from local Faunas—from notes made by different observers in various districts as to the frequency or scarcity of species in the counties in which they reside—that the master naturalist must build up his system for a nation. The humblest attempt therefore is not without its portion of utility." These are the opinions of the Rev. E. Lubbock, in the preface to his Norfolk Fauna, and the words must serve as my apology for presenting the following remarks to my brother naturalists. The order and classification adopted is that of the authors of the last edition of Bell's 'British Quadrupeds,'2 which is the standard work on the subject. 2 ['A History of British Quadrupeds, including the Cetacea.' By Thomas Bell, F.R.S., F.Z.S., &c. Second edition, revised by the author,