A Monograph of the Land & Freshwater Mollusca of the British Fanna. 



This Work is intended to he thoroughly Exhaustive, and will fully illustrate Variation, 

 Structure and Development. 



Information specially requested on Testacella and Limax. 



Co-operation is invited from all Conchologists interested in above subject. Any information, or 

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LIST OF YOUESHIBE LEFZDOFTERA, 



By Geo. T. Porritt, F.L.S. 



This includes copious records of localities for the 1 341 species of Macro- and 



Micro-Lepidoptera known to inhabit the County ; together with notes upon their 



local variations, habitats, times of appearance, and other points in their life-history ; 



and forms part of a series of Memoirs upon the Fauna and Flora of Yorkshire, 



which are being prepared under the auspices of the Yorkshire Naturalists' Union. 



To be had from the Secretaries of the Yorkshire Naturalists' Union, 



Wm. Denison Roebuck, Sunny Bank, Leeds, 



Wm. Eagle Clarke, 5, East View, Hyde Park, Leeds. 



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 Prof H. Carvill Lewis (Mineralogy), and Mr. Ellis H. Yarnall (Geographical 

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