PrcddcnVs Address. 37 



of recent years by the assistance of Messrs A. Sommervail (late 

 of Edinburgh), J. Henderson, and D. J. Brown. The collec- 

 tions of the Geological Survey, made by Messrs J. Bennie 

 and A. Macconochie, have lastly afforded some interesting 

 material for Mr Davidson's examination. 



In former pages reference has been made to the " Explana- 

 tions of the Geological Survey of Scotland." They claim our 

 attention as havinoj contributed in a lesser decree to tlie 

 elucidation of Scotch Fossil Conchology. They are officially 

 regarded as a description of the maps published on the 

 scale of one inch to a mile, pending the publication of 

 more detailed memoirs, descriptive of districts and mineral 

 fields. The palseontological portion is confined to an 

 Appendix giving lists of the fossils collected, and in 

 some cases a few descriptions of particularly interesting 

 forms. 



The first Survey publication to appear relating to Scot- 

 land was the Memoir N'o. 32, embracing the neighbour- 

 hood of Edinburgh, the Pentland and Bathgate Hills, and a 

 small corner of Fifeshire. The fossils from this district w^ere 

 collected by the late Messrs E. Gibbs and W. Ehind, and the 

 list drawn up by Mr J. W. Salter, comprising Brachiopoda, 

 31 sp. ; Bivalves, 9 sp. ; Gasteropoda, 10 sp. ; Cephalopoda, 

 11 sp. ; and Pteropoda, 1 sp. 



Memoir 33, containing the " Geology of East Lothian,"* 

 and Memoir 34, " Geology of Eastern Berwickshire," f 

 succeeded the foregoing, and in both full lists of fossils 

 from the south-eastern counties of Scotland are given. 

 In 1871 appeared the Explanation of Sheet 15, embracing 

 portions of Dumfries, Lanark, and Ayr shires, followed in 

 due course by Explanation 22, j Explanation 23, § and Ex- 

 planation 31. II 



In 1871 appeared the most important general communica- 

 tion published up to that date, bearing on the Carboniferous 

 fossils of Scotland, particularly the west, viz., " The Car- 



* Pp. 77, 8vo, 1866. f Pp- 58, 8vo, 1864. 



X North part of Ayrshire, 8vo, 1872. § Central Lanarkshire, 8vo, 1873- 



II South Stirlingshire, North Lanarkshire, and West Linlithgowshire, 8vo, 

 1879. 



