146 Guide to the Invertehrata. 



GALLEEY The next- palseontograpliical collection is of nearly equal 



^^- antiquity, and fully of equal merit. It is the Eocene Molluscan 



Edwards' collection formed by the late Mr. Frederick E. Edwards, F.G.S., 



Eocene about the year 1835, and was continually being added to, until 



IsSr' ^ ^^^ y^^^^ before his death, which happened in 1875. It was 



acquired for the nation by purchase in 1873. 



Table- Originally intended to illustrate the fossils of the London Clay, 



Mr. Edwards extended his researches over the Eocene strata of 



Sussex, Hampshire, and the Isle of Wight, where, assisted by 



Mr. Henry Keeping, he made the most complete collection ever 



attempted by any geologist, and it still remains unrivalled. 



Mr. Edwards contributed six memoirs to the Paleeontographical 



Society, 1848-1856 ; also separate papers to the London Geological 



Magazine, 1846, The Geologist, 1860, and the Geological Magazine, 



1865, descriptive of the Eocene Mollusca in his collection. 



Mr. S. Y. Wood continued the work for Mr. Edwards, describing 



and figuring the Eocene Bivalves in the annual volumes of the 



Talceontographical Society for 1859, 1862, 1870, and 1877. Each 



specimen which has been figured is specially marked. 



About 500 species have been described and figured, but the 



collection is very rich in new and undescribed forms. 



ij.jjg The last collection is that of a naturalist who devoted his entire 



Davidson life to the study and illustration of a single class of organisms, 



of Brachio- ^f^'^clj* the Erachiopoda. It was formed by the late Thomas 



poda, 'Davidson, LL.D., E.R.S., E.G.S., Y.P.Pal.Soc, etc. (of West 

 1837-86 • • • 



' Brighton, and Muir House, Midlothian), between the years 



1837 and 1886, with the object of illustrating his great work 



on the British Eossil Brachiopoda, published by the Palgeonto- 



graphical Society, in six quarto volumes, between the years 



1850 and 1886, comprising 2,290 pages of text and 234 plates, 



with 9,329 figures and descriptions of 969 species. 



Dr. Davidson was also the author of the Report on the 

 Brachiopoda collected by H.M.S. "Challenger" (voL i, 1880); 

 of the article "Brachiopoda" in the Encyclopaedia Britannica, 

 ninth edition, 1875 ; of a Monograph of Recent Brachiopoda 

 (Trans. Linnoean Society, 1886 and 1887) ; and of more than fifty 

 other separate memoirs mostly bearing upon Brachiopoda, both 

 recent and fossil, printed in the Transactions and Journals of 

 the various learned societies. 



Dr. Davidson's collection, both of recent and fossil Brachiopoda, 



