IMPORTANT WORKS ON NATURAL HISTORY. 



In the course of Publication, 

 I. 



IT.LUSTR ATTONS OF THE FOSSIL CONCHOLOGY 

 OF GREAT BRITAIN AND IRELAND. 



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



1. Each Number will conUiin Four Coloured Plates, engraved on Steel by the first Artists, with Four Pages of 

 Descriptive Letter-press; togetlicr with the Localities in which they occur, &c. price Three Shillings Coloured, or 

 Two Shillings Plain. A Fasciculus will appear regularly on the fii-st day of every month. 



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

 be systematically arranged, agreeably to the classification of Lamarck, with the recently formed Genera of Deshayes, 

 St)werbv, Parkinson, &c. introducctl into their respective jjlaces. Every Number will comprise at least Forty Shells. 



n. At the end of the \\'ork will appear a Stratigraphical Index, on an entirely new plan, exhibiting at one view 

 the whole British Species of Fossil Shells, with 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. 



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

 will appear regularly every month. Price Three Shillings Coloured, or Two Shillings Plain. 



2. The \\'ork will extend to Fifteen Numbers, contiiining in all Fifty-eight Plates, with about Twelve Hundred 

 Figures of Shells, being Representations of ALL the Species discovered up to the present time, including Marine, 

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

 already engraved by Mu W. H. Lizars, so that the Work will appear with the utmost regularity. 



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

 logy in which the Am.mals have been introduced, and is sold at a price not a third of otliers which do not contain a 

 half of the Species, while the Engravings are executed in a much higher style of art. 



III. 



In the Press, and Speedily Tcill Appear, 



THE ELEMENTS OF FOSSIL CONCHOLOGY, 



Illustrated 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 

 Brown, F.L.S., &c. Royal 18mo. 



IV. 

 THE AMERICAN ORNITHOLOGY 



Of ALEXANDER WILSON, and CHARLES LUCIAN BONAPARTE, Prince of Mnsignano, 

 with the addition of all the newly discovered Species, systematically Arranged ; and a Life of the 

 Author. By Captain Thomas Bkowx, F.L.S., &c. 



L This Work will appear in Monthly Nuuibers, each containing Six Coloured Plates, of a royal 4to. size, 

 accompanied by Twelve Pages of Letter-press. Price Three Shillings and Sixpence. 



2. The \Vork will extend to 'I'liii'ty-one Numbers, and will form, when com]jlete, two handsome royal 4to. 

 volumes, with One Hundred and Eighty-six Plates. The whole of the Land Bir«ls the dimensions of a pigeon and 

 under are the size of nature, and exhil>it both male and female where a diflerence exists in the plumage of tlie sexes, 

 and in some cases the young, and arc all at least the sizes of tliose of the justly celebrated original work; and many of 

 the Water Birds have been considerably enlarged. 



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

 celebrated artists. 



4. This Work, when completed, will not have cost the sulwcribers, even with the addition of upwards of One 

 Hundred and Fifty Birds, more than an eighth part of the original American edition, now out of print, which 

 was published at a sum exceeding £40, and is in the hands of very lew individuals in Great Britain. 



