RKPOXE OS THE COMMITTEE. 157 



was commenced by two of the original members of the Society, 

 Messrs. Alder and Hancock, the splendid work on the Nudi- 

 branchiate Mollusca. A work so excellently and faithfully 

 illustrated had not before been produced in England, and the 

 authors obtained a world-wide reputation. These years, then, 

 form an important epoch in the history of the Society. 



During the twenty years, from 1846 — 66, much of the scien- 

 tific work of the members was contributed to and appears in the 

 Transactions of the Tyneside Naturalists' Field Club, a Society 

 which owed its origin to and received early and continued sup- 

 port from many of the active members of the Natural History 

 Society. To these volumes were contributed several extensive 

 and valuable Catalogues ; of the Mollusca and Zoophytes of 

 Northumberland and Durham, by Mr. Joshua Aider ; of the 

 Diurnal Lepidoptera, by Mr. Geo. "Wailes; of the Indigenous 

 Mammalia, by Messrs. Mennell and Perkins. In the same 

 Transactions will be found a Catalogue of the Coleoptera, by 

 Messrs. Hardy and Bold ; a Catalogue and Notes of the Permian 

 Fossils and Fossil Mammalia, by R. Howse; of the Marine Algse, 

 and other contributions, by Prof. G. S. Brady and others. 



Since 1866 the joint Transactions of the two Societies have 

 been published under the title of Natural History Transactions 

 of Northumberland, Durham, and Newcastle-on-Tyne, contain- 

 ing many Catalogues and papers by members of both Societies. 

 The New Flora of Northumberland and Durham, by Messrs. 

 Gilbert Baker and Tate ; the Foraminifera, by H. B. Brady; the 

 British Entomostracan Families, Bosminida3, etc., by Rev. A. M. 

 Norman and George Brady ; the Echinoderms, by George Hodge ; 

 the Homoptera, Hemiptera, Aculeate Hymenoptera, and a revised 

 Catalogue of the Coleoptera, by Thos. J. Bold ; and the Catalogue 

 of the Birds of Northumberland and Durham, by John Hancock ; 

 in addition to numerous papers on different subjects by other 

 members. 



There remains still much to be done in the way of Catalogues 

 and Memoirs. Though much has been published on many sub- 

 jects, yet there are fields of investigation as yet untouched for 

 future research and observers. The Carboniferous Limestones 



