EXPLANATION OF THE PLATES. 



Plate Page 



( View of Blue Anchor Point ; Foreshore Section ^ 



near the first gypsum-workings ; upper and 



J Lower Parts of the Cliff at Blue Anchor | 



I-IV-{ Point; and Warren Farm Section, illustrating )■ 1 



Mr. L. Richardson's paper on the Rhaetic and I 



j Contiguous Deposits of West, Mid, and Part of | 



^ East Somerset J 



i'Map of the Permian and Trias of the North- ""i 

 Y J East of England, illustrating Dr. R. L. Sher- I „- 

 , lock's paper on the mutual relationship of those j 

 i v formations in Nottinghamshire J 



( Sketch-map showing the extension of the Eocene^ 



and Oligocene strata in Egypt, illustrating j 



VI { Dr. W. F. Hume's paper on the Effects of y 118 



Secular Oscillation in that Country during the | 



^ Cretaceous and Eocene Periods J 



( Gerablattina, Archimylacris, and Hemimtla- \ 

 cris ; Gerablattina (Aphtheroblattina) sul- 

 cata ; Archimylacris (Etoblattina) hast at a ; 

 VII- X<( and Orthomylacris, Archimylacris, Lampro- )■ 149 

 ptiiia, etc., illustrating Mr. H. Bolton's paper [ 

 on Insect-Remains from the South Wales Coal- | 



^ held ; 



f Geological Map of Skomer Island and the 1 

 Y T J adjacent Pembrokeshire Coast, illustrating' ,,_.. 

 Mr. H. H. Thomas's paper on the Skomer f" 1/0 



Volcanic Series 



( Gteological Map of the Cautley District, illus- "] 

 Y jj I trating the paper by Miss G. R. Watney & I 01 _ 

 A 1 Miss E. G. Welch on the Salopian Rocks of [ J16 



{ Cautley and Ravenstonedale J 



( Gully in the Um Esh Range; View from the") 

 summit of a Gravel-terrace, and Limestone 

 Fretted away by Wind-blown Sand ; Coarse | 

 xTTT-XVT J Sand with miniature Dreikanter and White I 9 o Q 



] Limestone Cliffs, Jubal Island ; and Block f 

 of Weathered Granite and Arrowhead Twin | 

 of Gypsum, illustrating Dr. A. Wade's paper on | 



^ the Eastern Desert of Egypt J 



( Teeth of Ptychodus decurrens ; Teeth of Pty-'] 

 chodus dixoni and Pt. latissimus ; Teeth of { 

 i Ptychodus polygyrus ; and Teeth of Ptycho- I 9fi o 



j DUS POLYGYRUS, Pt. MAMMILLARIS, Pt. RUGOSUS, j 



| and Pt. mortoni, illustrating Mr. G. E. Dibley's j 

 [ paper on the teeth of that genus ) 



