IMPORTANT WORKS ON NATURAL HISTORY. 



In the course of Publication, 

 I. 



IMASTR ATIOXS OF THE FOSSIL CONCHOLOGY 

 OF GREAT BRITAIN AND IRELAND. 



BY CAPTAIN THOMAS HUOWX, T.L.S., &c. 



1. Each Number will contain Four Coloured Plates, engraved on Steel by the fii-st Artists, with Four Pages of 

 Descriptive Lctter-prevs ; tojrttlu r with the Localities in wliicli they occur, &c. price Three Shillings Coloured, or 

 Two Shillings Plain. A Fasiiciihis will appear regularly on the first day of every month. 



2. The Work will extend to Twenty-five Numbers, containing in all One Hundred Plates. The Species will 

 Ix: s^•stcmnticallv arranged, agreeably to the classification of Lanuirck, with the recently formed Genera of Deshayes, 

 Sowerbv, Parkinson, ^c. introduced into their respective places. Every Number will comprise at least Forty Shells. 



8. At the end of the Work will appear a Straiigraphical Index, on an entirely new plan, exliibiting at one view 

 die whole IJrilisli Species of Fossil Shells, wiU» their Geological positions. 



II. 



ILLUSTRATIONS OF THE CONCHOLOGY 

 OF GREAT BRITAIN AND IRELAND. 



BY CAPTAIN THOMAS BROWN, F.L.S., &c. 



SECOND EDITION, WITH ADDITIONS. 



1. Each Numlier will contain Four Coloured Plates, with complete Descriptions, Localities, &c. A Fasciculus 

 will appear regularlv every month. Price Two Shillings and Sixpence Coloured, or One Shilling and Sixpence 

 Plain. 



*2. The Work will extend to Fifteen Numlwrs, containing in all Fifty-eight Plates, with about Twelve Hundred 

 Figures of Shells, l)cing Representations of ALL the Species discovered up to the present time, including Marine, 

 Land, and Fresh Water ; together with Illustrations of the Animals of nearly the whole Genera. The Plates are all 

 already entjraved by Mn W. H. Lizaks, so that the Work will appear with the utmost regularity. 



3. This is the only M'ork which contains Representations of ALL the Species, and is the only British Concho- 

 logA- in which the .\ni.mai.s have l)een introduced, and is solil at a price not a third of otliers which do not contain a 

 hiiM'of the .'s|>ecies, while the Engravings are executed in a much higl»er style of art. 



III. 



In the Press, and Speedily xaill Appear, 



THE ELE^IENTS OF FOSSIL CONCHOLOGY, 



Illustratetl by Figures engraved on Steel, of ALL the known Genera ; with their Generic Characters, and a 

 complete Description of their application to the elucidation of the various Geological periods. By Captain Thomas 

 IJnowN, F.L.S.. ^c. Roval IHmo. 



IV. 

 THE AMERICAN ORNITHOLOGY 



Of ALKXANDKR WILSON, and CHARLE.S LUCIAN BONAPARTE, Prince of Miisignano, 

 with the addition of all^ thi- newly discovorpd Species, systematically Arranged ; and a Life of the 

 Author. IJy Cai'Tain Thomas Bkown, F.L.S., &c. 



I. This Work will appear in Monthly Numbers, each containing Six Colouretl Plates, of a royal 4to. size, 

 accompaniwl bv Twelve Page-s of Letter-jiress. Price Three Shillings and Sixpence. 



*J. The \\\nV will extend to Thirty-one Numbers ""d will form, when complete, two handsome royal 4to. 

 volumes *ith One Hundred and Eighty-six Plates. The whole of the Land Birds the dimensions of a pigeon and 

 under arc the size of nature, and exhibit Iwtli male and female where a dilK icnce exists in the plumage of the sexes 

 and in some ciuses the yoinig, and are all at least the sizes of those of the justly celebrated original work ; and many of 

 the Water Birds have Ineri considerably enlargKl. 



.-). Nearly the whole Plates are already engraved, by Lizars, Scott, Mitchell, Miller, Milne, Harvey, and other 

 celebrated artists. 



A. This Work, when completed, will not have cost the subscrilxirs, even with the addition of upwanls of Oni 

 Hi Nnnrn ano Fn ty Biiids. niore than an eighth part of die original American edition, now out of print, whicl 



, ,. , , ,. ., , o ■• — — I J .ihich 



w.L, published at a sum cxceetlmg £4(1, and is in the hands of vtrv lew individuals in Gr«it Britain. 



