EXPLANATION OP THE PLATES. 



Plate Page 



/^Microscope Rock-sections of Diorites, Quartz- \ 

 ( Felsite, etc. from Guernsey, illustrating the | 

 I { paper by Prof. T. G. Boiinej and the Eev. E. ^ 31 

 I Hill on the Petrology of that and other Channel | 

 (^ Islands J 



I Geological Map axd Section of the Upper 

 yj Y J VoBSTER Inlier, and Views of Vobster Quar- 

 ^ ries, illustrating Dr. T. F. Sibly's paper on the 

 Carboniferous Limestone of that locality 



I 



58 



/^Geological Map of the Kilbride Peninsula ^ 

 j (Mayo) and Exposures of Spilite and the i 

 VT ^ vttJ associated Chert, illustrating the paper by i 

 M &. Mii T^j^,_ ^ -^ Gardiner & Prof. S. H. Eeynolds on f ''^ 

 I the OrdoTician and Silurian Eocks of that pen- j 

 [ insula ,. J 



( Concentric structure in Lava at El Brazil ; "^ 

 I Alluvium, etc. in Salinas Bay; and Micro- | 

 VIII & IX -( scope Kock-sections, illustrating Mr. J. Ro- )■ 103 

 I raanes's paper on the geology of a part of Costa j 

 1^ Rica , ) 



\ Geological Map of the Glen-Orchy District, 1 

 X<j illustrating the paper by Mr. E. B. Bailey & ^ 164 

 [ Mr. M. Macgregor on the Glen-Orchy Anticline. J 



fMAP of part of the River Dee. to show the~^ 

 1 Distribution of the Drift and the pre-Glactal | 

 XI ■{ Topography, illustrating Mr. L. J. Wills's paper )■ 180 

 I on late Glacial and post-Glacial Changes in the j 

 l^ Lower Dee Valley j 



/^Bedded sandy brick-earth at Walter's Ash;'^ 

 I Sarsen with a vermicular surface, Lee Gate ; 

 ! and Map op the Superficial Deposits of Part | 

 XII-XIV^ OF the Thames Basin, illustrating the paper by )■ 199 

 Dr. R. L. Sherlock & Mr. A. H. Noble on the j 

 I Glacial Oi-igiu of the Clay-with-Flints of Buck- | 

 l^ inghamshire, etc ) 



1^ Section in Pickett's-Lock Pit at Ponder's^ 

 ! End ; and Section of the Arctic Bed in the j 

 XV & XVI ^ Angel-Road ballast-pit, illustrating Mr. S. H. } 213 

 I Warren's paper on a Late Glacial Stage in the j 

 l^ Valley of the River Lea, etc ) 



