﻿304 DB. A. VAUGHAN ON THE PAL^ONTOLOGICAL [May "1905, 



Fig, 2 a, Calyx; X 1*4. 



Horizon (3 ; Avon section, Clifton (Gloucestershire). 



2 b. Calyx of a very young example ; X 1'5, 



Horizon y ; Burrington section (Mendips), near Wrington 

 (Somerset). 

 Figs, 2c-2e. Horizontal sections ; X 1*3. 



Z 2 subzone. 2c, 2d from Portishead (Somerset). 2e from 

 Clevedon (Somerset). 

 Figs. 3-3 d. Zaphrentis aff. cornucopia (Micbelin). 

 Fig. 3. Exterior ; natural size. 



Z 2 subzone ; Avon section, Clifton (Gloucestershire). 



3 a. Calyx ; natural size. 



Z 2 subzone ; Clevedon (Somerset), 

 Figs. 3 b & 3 c. Horizontal sections ; x 1'25. 



Z 2 subzone. 3 b from Portishead (Somerset). 3 c from Cleve- 

 don (Somerset). 

 Fig. 3 d. Horizontal section of a very young example ; X 2 - 3. 



Z 2 subzone ; Clevedon (Somerset). 



Plate XXIII. 



Figs. 1 & la, Caninia cylindrica (Scouler). 



Fig. 1. Mutation 7. Horizontal section of a small example ; X 1*5. 



Horizon y : Burrington section (Mendips), near Wrington 

 (Somerset). 

 1«. Mutation S r Horizontal section ; xl'5. 



S x subzone ; Avon section, Leigh Woods, Bristol (Somerset). 

 Fig. 2. Cyathophyllum 9. Horizontal section ; X 1"5. 



Horizon y ; Clevedon (Somerset). 

 Figs. 3-3 b. Cyathophyllum = Cyathophyllum Stutchburyi, Ed. & H. (pars). 

 Fig. 3. Horizontal section of a young example ; X 1*4. 

 Horizon c ; Failand, near Bristol (Somerset). 

 3 a. Horizontal section of a typical example ; X 1'4. 

 Horizon d ; Failand, near Bristol (Somerset). 

 3 b. Part of the vertical section of a large example ; natural size. 

 Horizon d ; Holwell (Mendips), near Frome (Somerset). 

 Fig. 4. Koninckophyllum 9. Horizontal section ; X 1'5. 

 J) 1 subzone ; Sodbury (Gloucestershire). 

 5. A Clisiophyllicl Lithostrotion. Horizontal section ; X 1*5. 

 D l subzone ; Sodbury (Gloucestershire). 



Plate XXIV. 



Fig. 1. Dibunophyllum 9. Horizontal section ; X 1"5. 



L\ subzone ; Flax Bourton, near Bristol (Somerset). 

 1«. Dibunophyllum <p. Exterior; very slightly reduced (X '95). 

 D x subzone ; Flax Bourton, near Bristol (Somerset). 

 Figs. 2 & 2 a. Dibunophyllum xp. 

 Fig. 2. Exterior ; x 11 



D 2 subzone ; Eownbam Hill, Leigh Woods, Bristol (Somerset). 



2 a. Horizontal section ; X 1*45. 



D 2 subzone ; Kownham Hill, Leigh Woods, Bristol (Somerset). 

 Figs. 3-36. ' Clisiophyllum'' (Carcinophyttum) 9. 

 Fig. 3. Calyx ; natural size. 



P-l subzone; Sodbury (Gloucestershire). 



3 a. Horizontal section ; x 143. 



D x subzone ; Flax Bourton, near Bristol (Somerset). 

 3 b. Horizontal section ; x 1'6. (To show variation in the structure 

 of the central area.) 

 D 1 subzone ; Sodbury (Gloucestershire). 

 Fig. 4. Axophyllum 9. Horizontal section ; x 1*5. 

 D 2 subzone ; Wrington (Somerset). 



