10 GUIDE TO THE FOSSIL INVERTEBRATE ANIMALS. 
Gallery XI. from every geological formation, many of them named and 
1^ described for the first time in the “ Mineral Conchology,” 
and therefore the type-specimens of the species to which 
they are referred. Many of the green discs indicating 
figured specimens were actually fixed by James Sowerby. 
The ammonites and cirripedes of this collection have been 
removed to their respective positions in the general systematic 
series in Galleries VII and YIII (see pp. 1(J7 and 94). The 
collection was purchased by the Trustees of the IMuseum from 
Mr. J. de Carle Sowerby in 1861. 
The two collections which follow owe their inception to a 
.society known as The London Clay Club, founded in 1838 
by a few London geologists — namely, J. S. Bowerbank, 
Searles V. Wood, John Morris, Alfred S. White, Nathaniel 
Wetherell, J. de Carle Sowerby, and F. K. Edwards. Originally 
intending to illustrate the British Eocene IMollusca, they 
eventually in 1847 founded the I’alseontographical Society for 
the purpose of monographing all the fossils of tlie British Isles. 
Table-cases Here is exhibited the collection of Eocene ]\lollusca, begun 
by Frederick E. Edwards (1799-1875) about 1835, and 
continually increased until a few years before his death. 
It was purchased by the nation in 1873. Starting with the 
fossils of the I.ondon Clay, Edwards extended his researches 
to the Eocene strata of Sussex, Hampshire, and the Isle of 
Wight, where he was assisted liy Mr. Henry Keeping. This 
collection served as the basis of six memoirs contributed to 
the monographs of the Balseontographical Society, 1848-56, 
and of various other papers published by him. The Eocene 
bivalves in the collection were described by Searles V. Wood 
in the volumes of the Palaeontographical Society for 1859, 
1862, 1870, 1877. About 500 species were thus described 
and figured, but the collection also contains many new 
and undescribed forms to which manuscript names were 
applied by Edwards. A catalogue of the collection, by 
Mr. 11. Bullen Newton, Avas published by the Trustees 
in 1891. 
Tlie first publication of the Paheontographical Society 
was Part I. of the “ Crag Mollusca ” — a monograph by 
Searles V. Wood (1798-1880), published between the 
Table-cases years 1848 and 1861, with supplements in 1871, 1873, and 
1, 2, 3. 1879. The collection on which this work was based was 
begun in 1826, and took about thirty years to form. It 
represents the Molluscan fauna of the Bed and Coralline 
Crags of the neighbourhood of Woodbridge, and from Aid- 
