THE NATURALIST. 



Journal of The Yorksliire Naturalists' Union, and General Field-Club Record. 

 Edited by C. P. HOBKIRK, F.LS., and G. T. PORRITT, F.LS. 



Monthly, price 4d., or 4s. per annum in advance. 



Containing Original Articles on Natural History Subjects ; Papers read at Meetings of 

 Natural History Societies and Field Clubs ; Reports of Meetings and Excursions ; Notes 

 and Queries ; Exchanges ; Diary of Meetings, &c. 



The volumes commence with the August number in each year. Vol. IV. commenced 

 August 1878. Post free of 



B. BROWN, Publisher, HaoDERSFiELD. 

 This day is published, 



A MONOGRAPH OF THE SILURIAN FOSSILS OF THE 

 GIRVAN DISTRICT IN AYRSHIRE, 



WITH SPECIAL REFERENCE TO THOSE CONTAINED IN 



THE "GRAY COLLECTION." 



Fasciculus I. (Rhizopoda, Actinozoa, Trilobita). 



By H. ALLEYNE NICHOLSON, M.D., D.Sc, &c., 

 Professor of Natural History in the University of St Andrews ; and 



ROBERT ETHERIDGE, JUN., F.G.S. 

 With Nine Lithograph Plates, and other Illustrations on Wood. Super Royal 8vo, 7s. 6d. 



WILLIAM BLACKWOOD & SONS, Edinburgh and London. 



On the \st of every Month, price Sixpence, 2^ pp. 8vo, 



THE ENTOMOLOGIST'S MONTHLY MAGAZINE, 



Conducted by J. IV. DOUGLAS; R. M'LACHLAN, F.R.S., F.L.S.; 

 E. C. RYE, and H. T. STAIN TON, F.R.S., 6-Y. 



This Magazine was commenced in 1864, and its pages are principally devoted to infor- 

 mation respecting British Entomology. 



London : JOHN VAN VOORST, i Paternoster Row, E.C. 



N.B. — The volumes commence with the June number in each year. Subscriptions (6s. 

 per volume, post free) should be forwarded to the Editors at the above address. 



H. W. MARSDEN, 



BEING in regular communication with the best Collectors in NORTH- 

 ERN and EASTERN EUROPE, can always supply fine Specimens of 



EUROPEAN & BRITISH BIRDS' EGGS AND BIRD-SKINS, 



Including many very rare Species. Price Lists on application. 

 SPECIAL ! — Young Birds in the Down, from Lapland, «S:c,, are now on offer. 

 Also PRESERVED LARV^ of LEPIDOPTERA : EUROPEAN and EXOTIC 

 LEPIDOPTERA, COLEOPTERA, ORTHOPTERA, &c., &c. ; and the best BOOKS 

 on ENTOMOLOGY, ORNITHOLOGY, and OOLOGY. 



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