400 GEOLOGY AND PALAEONTOLOGY. 



investigation must ever owe a debt of gratitude ; Dr. David Robertson, 

 F.G.S., and Dr. (Jrosskey, F.G.S., his coadjutor in the investigation of the 

 Clyde Post-tertiary beds ; James Thomson, F.G.S., known generally as 

 " Coral " Thomson, for his laborious work in connection with that group ; 

 Robert Craig, of Beith, an ardent worker in the Carboniferous Limestones of 

 Ayrshire ; Dugald Bell, F.G.S. an enthusiast in the study of geological glacial 

 phenomena ; James Bennie, of the Geological Survey, whose investigations, 

 more especially in connection with "Surface Geology," have bee.n of great 

 importance ; and Mr. James W. Kirkby, of Leven, Fifeshire, an authority 

 upon all connected with the Carboniferous rocks, whose death occurred only 

 within the last few weeks. 



In conclusion it may be added that though the nomenclature of many of 

 the genera and species will be found to be altered from that of the 1876 

 Catalogue there is much in that volume which has not been superseded in 

 the present Handbook. The attention of students may therefore still be 

 directed to it for much interesting matter. 



