134 



PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



Mange and Distribution of the Mollusca of the Bracklcsham Sands 

 and Barton Clay in the English and French Eocene marine series^ 

 with the cojnparative range of species in each series separately . 







-{- 





French area. 







,;; 1 









c 



o w 



o ^ 



O CO 



O u 





o 



<u 











-u 3 





^1 



o 



Ti (» 



C 5^ 



fl CO 



^•h 



c.5i 





<" . 



<u 



c: TS 



o ?C- 



O g 



o Fr 



O U 











a^ 



a 2 



S be 



1- 



!2 O 



a^ 

 a^s 













ro f^ 



o 



O CO 





o 



<u ^ 



qj cs 



« ,^ 



« .t2 



<u ^ 





O 







2^ oj 



«r1 















Oh ^ 



a a; 





Oh 4) 



• 









OQ ■ZS 



(n % 



c/^i 













4-> 





-^ 



Barton Clay 



252 



368* 



140 

 221 



112 



56 



77 

 94 



82 

 142 



47 

 75 



10 

 15 



Bracklcsham Sands 







M-J 



u 



03 



English area, j 



o 



o 



o . 





o 



,rl 



ai 



+j 





■" >. 







^2 



e TS 



^ 





'- ca 





0) 



S i 

 5 "5 



r of pec 

 pecies. 



•rH qj 



a &c 



o 



a-S 



o « 



1^ 

 a o 



O nS 





o 



<U CO 



a 



3 



4) <U 



Oh P 

 C/5 



a, 



(Z3 



CO O 



'Em 



M O 



Sables Moyens 



377 



150? 



^'?6 



17 



94 



13 



Calcaire Grossier 



651 360? 



182 



82 



142 



17 









* This and the two following numbers will have to be slightly increased and 

 modified by the additiou of the species recently described by Mr. Edwards in the 

 Monographs of the Pulseoutographical Society. The Bracklesham figures under 

 the French area have been corrected to that extent. 



f With reference only to the strata on this and lower levels. In the two 

 French series I cannot pretend to much accuracy, as the data are not yet sufiicient, 

 and the French geologists are not agreed upon many identifications. 



[Note § to p. 128. — Or I can suppose the slow small rise of a tract between the 

 French and English areas, in the diiectiou of the coasts of Normandy and Brittany, 

 partly isolating the French area, gradually shutting out the sea, and giving, on a 

 large scale, a partly lenticular form to the upper divisions of the Calcaire grossier; 

 the centre of the French area, in the mean time, remaining at rest, and the 

 English area subsiding.] 



