IMPORTANT WORKS ON NATURAL HISTORY. 



In the course of PubUcatio7i, 

 I. 



ILLUSTRATIONS OF THE FOSSIL CONCHOLOGY 

 OF GREAT BRITAIN AND IRELAND. 



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



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

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

 Two Sliiiiiiigs Plain. A Fasciculus 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 

 be sj'stematically arranged, agreeably to the classification of Lamarck, with the recently formed Genera of Deshayes, 

 Sowerby, Parkinson, &c. introduced into their respective places. Everj* Number will comprise at least Forty Shells. 



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

 the whole British Species of Fossil Shells, with their Geological positions. 



11. 



ILLUSTRATIONS OF THE CONCHOLOGY 

 OF GREAT BRITAIN AND IRELAND. 



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



SECOND EDITION, WITH ADDITIONS. 



\. 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, containing \n all Fifty-eight Plates, with about Twelve Hundred 

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

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

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



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

 log}' in which tlie ANi.^fALS have been introduced, and is sold at a price not a third of od)ers 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 will Appear, 



THE ELEMENTS OF FOSSIL CONCHOLOGY, 



Illustrated by Figures, engraved on Steel, of ALL the known Genera ; with (heir Generic Characters, and a 

 complete Description of their application to the elucidation of llie various Geo!t)gical periods. By Captain Thomas 

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



IV. 

 THE AMERICAN ORNITHOLOGY 



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

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

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



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

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



2. The Work will extend to Thirty-one Numbers, and will form, when complete, two handsome royal 4to. 

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

 under are the size of nature, and exhibit lx)th male and female where a difference exists in the plumage of tlie sexes, 

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

 the Water Birds have been considerably enlarged. 



3. 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 sid)scrilx-rs, even wiUi the addition of upwards of One 

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

 was published at a sum exceetling I' 40, and is in the hands of ven- 'ew individuals in CJreat Britain. 



