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AN UNIQUE SERIES OF LANTERN SLIDES, 



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Fifty Slides, from recently taken Negatives. 



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UNIVERSAL SCIENCE SERIES. 



READ Y THIS IVEOI^TH:, 



Vol. I. of 



BUTTERFLIES OF THE 



PALAEARCTiC REGION, 



By the Rev. H. C. LANG, M.D., F.E.S., &c. 



Comprising the Papilionidae, with Four Coloured and Thirty-four Photo Process Plates, handsomely printed on art 

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