No. 9.--Soft-bodied Invertebrate Animals; Shells of Molluscs. 3rd Edition. 1909, 8vo. 3_d._ No. 10.--Plants. 4th Edition. 3 Figures in text. 1909, 8vo. 3_d._ No. 11.--Fossils and Minerals. 3rd Edition. 1906, 8vo. 3_d._ ECONOMIC SERIES. No. 1.--The House-Fly as a danger to health. Its Life-history, and how to deal with it. By E. E. Austen. 2 Plates (4 figures), and 3 text-figures. 1913, 8vo. 1_d._ * * * * * _The Guide-Books can be obtained only at the Natural History Museum. Postage extra. Written communications respecting them should be addressed to_ THE DIRECTOR. REGULATIONS FOR THE ADMISSION OF STUDENTS. 1. The Exhibition Galleries are open free daily except on Good Friday, Christmas Day, and any Fast or Thanksgiving Day appointed by authority. (For hours of admission see back of cover.) 2. The hours for the Study Collections are, throughout the year, from ten till four o’clock every day in the week, except Sunday. 3. Persons desiring special facilities for study or drawing in the Exhibition Galleries, or admission to the Study Collections, must apply in writing to the Director of the Museum for a Student’s ticket, specifying the profession or business, and place of abode of the applicant, and the Department of the Museum (viz., Zoology, Entomology, Geology, Mineralogy, or Botany) to which admission is required. 4. Every such application must be made two days, at least, before admission is required, and must be accompanied by a written recommendation from a householder (whose address can be identified from the ordinary sources of reference), or a person of known position, with full signature and address, stated to be given on personal knowledge of the applicant, and certifying that he or she will make proper use of the department of Natural History to which such admission is required. 5. If such application or recommendation be unsatisfactory, the Director will either refuse admission, or submit the case to the Trustees for their decision. 6. Tickets of Admission must be produced if required, and are not transferable. 7. The privilege of admission is granted upon the following conditions:-- (_a_) That it may be at any time suspended by the Director. (_b_) That it may be at any time withdrawn by the Trustees in their absolute discretion. 8. All communications respecting the Departments of Natural History should be addressed to-- THE DIRECTOR, BRITISH MUSEUM (NATURAL HISTORY), CROMWELL ROAD, LONDON, S.W. NUMBER OF VISITORS TO THE MUSEUM FROM THE DATE OF OPENING (18TH APRIL, 1881).