ON NATURAL HISTORY MUSEUMS. 13 Warwick.11 As the history of this Museum has been written by Mr. W. Cole in one of our little "Handbooks" I am relieved of the necessity of entering into historical details.12 It is not without interest, however, on the occasion of this—our twenty- fifth—annual meeting, to recall the fact that the idea of forming a museum was entertained by those who founded the Club, and was distinctly explained by our first President, Prof. Meldola, in his inaugural address. There is probably no member of our Club ignorant of the way in which that idea, though long in abeyance, was ultimately carried out through the enlightened policy of the Corporation of West Ham, associated with the munificence of Mr. Passmore Edwards. On entering the Passmore Edwards Museum, anyone familiar with the details of museum work will be struck with the admirable way in which modern ideas have been carried out. It is not a museum run on old lines, like many of those which are themselves qualified to be preserved in a larger museum as interesting, but rather melancholy, records of obsolete science. True it is but a small museum, yet it is arranged in harmony with the state of knowledge in the twentieth century. In a discussion on "The Museum Question" a few years ago in Liverpool, Prof. Herdman, one of our most distinguished naturalists, condemned the usual methods of exhibiting natural history objects as suggestive of the days of Linnaeus, rather than of present day biology.13 At Stratford, however, he would find, I venture to think, little or nothing of an antiquated character. Mr. Cole has taken care that the biological clock should not be put back to the time of Linnaeus. Let the visitor turn to the left as he enters the building, and he finds himself at once in a recess surrounded by cases which contain beautiful illustrations of the leading Principles of Bionomics. Here are several . well- chosen series of specimens, chiefly insects, illustrating such subjects as protective and aggressive resemblance for conceal- ment by colour and form ; protection by warning colours ; mimicry, or imitation of protected animals ; and dimorphism or differences relating to season and sex. In a yet more prominent position in the body of the hall is a wall-case devoted to specimens, 11 Essex Naturalist, Vol. xi. (1901), p. 319. 12 The Essex Museum of Natural History. By W. Cole, F.L.S., Museum Handbook, No. 3, 1900. 13 "The Museum Question." Report of Liverpool Geological Society, Vol. ix. (1901), p. xxvii.