Yorkshire Naturalists' Union. 



ANNUAL MEETING, 



Doncaster, 



Tuesday, 3rd March. 



PRESIDENTIAL ADDRESS at 6.30 p.m., 



by Rt. Hon. Lord Walsingham, M.A., F.L.S. 



A MICROSCOPICAL SOIREE 



will be provided by 



the Doncaster Microscopical Society. 



Full particulars in the usual circulars. 



WM. DENISON ROEBUCK, ) Ho7i. Sees. 

 WM. EAGLE CLARKE, f Leeds. 



Small 8vo. is. 



Notes on Natural Selection and the Origin of Species. 



By FRANCIS P. PASCOE, F.L.S., 



Fo7-7ue;-ly Pj-esidcnt of the Entomological Society. 

 ' It is the best compendium of objections that I have seen.' — jNIr. G. F. Ro:\ianes, F.R.S., in lit. 

 TAYLOR & FRANCIS, RED LION COURT. 



By the same ATithor, 



List of British Vertebrate Animals. 4s. 



TAYLOR & FRANCIS, RED LION COURT. 

 2nd edition. Small 8vo. 12s. 



Zoological Classification : a Handy Book of Reference. 



\YiTH A Glossary. 



' We know of no volume which, in the same space, contains so much reliable information.' — Nature. 

 YAN YOORST, i, PATERNOSTER ROW. 



The Student's List of British Coleoptera. 4s. 6d. 



With Synoptic Tables, 

 TAYLOR & FRANCIS, RED LION COURT. 



THE NATURALIST'S WORLD. 



MONTHLY - - PRICE TWOPENCE. 



"A delis^htful publication." — Xottiiigham Daily Giiardiaii. 



A PRIZE OF TWO GUINEAS 



Is offered for the best account of the lives of any two of the following well known 

 Naturalists: — Hugh Miller, Agassiz, William Smith, Linnxus, Charles Darwin, 

 Charles AVaterton. 



No essay to exceed 400 words, making a total of 800 for the two. 



Competitions must reach the Editor not later than Februarj- 15th. 



Full particulars of this prize will be found in the January number, post free for 2.W. from 

 the Offices, Ilklev, Yorks. 



THE JOUMAL OF MICROSCOPY AMD N ATURAL SCIEhE 



PUBLISHED QUARTERLY, PRICE 16. 



This well-known Journal, the recognized organ of the POSTAL MICROSCOPICAL 

 SOCIETY, contains a number of valuable and interesting articles relating to evpry department 

 of Microscopy and the allied Sciences. 



These are all written by experienced Microscopists and Specialists in their various departments 

 of Science, and are illustrated by a number of Lithographic Plates — making it not onlj- one of the 

 largest and cheapest, but also one of the most widely circulated Journals of its class. 



Other special features of the Journal are "Half-hours at the Microscope with Mr. Tufifen 

 West, F.L.S., F.R.^kl.S., etc.;" '• Selected Notes from the Society's Note-books." New books, 

 relating to Microscopy, or to anj- branch of Natural Science, are carefully reviewed. Correspon- 

 dence on matters of Microscopic or Scientific interest is inserted. There is also a section devoted 

 to "Current Notes and Memoranda," "Exchanges," &c. 



The Journal of iNIiCKOSCOPV and Natural Science is edited by AIk. Alfred Allen, 

 Hon. Sec. of the Postal Microscopical Societj', under the direction and with the assistance of the 

 Committee ; and may be had of all Booksellers. 



London : BAILLIERE, TINDALL & COX, 20, King WilUam St., Strand, W.C. 



