576 MESSRS. JUKES-BROWNE AND W. HILL ON" THE LOWER PART 



Table II. (continued). 





Basement- 

 bed. 



Inocera- 

 mus-beds. 



Upper Beds. 





m and 

 1, &c. 



o 





o 







3 





o 





S3 O 



fl 



o3 



d 



o 



& 



ft 



P 



03 



""So 



rH 



OQ 



83 







-u 

 m 



o 



00 



i—H 



o 



"a 



as 



• r-l 



OQ 



© 



'-+3 



o 



go 





XJ1 



td 



pH 



rH 



ill 





Q 





S3 

 TfX 



W 



Pelecypoda (continued). 



















B 





. • ■ 



V 



■l- 

























• • • 





* 







* 



* 



... 



* 















... 



... 



... 



B 















. . • 



X 



















... 



* 



... 



# 







... 









. . . 



... 





... 



... 



... 





.... 



B 



SSI 



Gasteropoda. 























... 



# 

















Cephalopoda. 

























... 



. . ■ 



. . . 























¥r 





















































* 

















m . 















# 







Belernnitella ultima, Sharpe 





















Fish. 

























# 

















The letter B in the above list indicates that the species is quoted 

 from Dr. Barrois's ' B-echerch.es sur le Terrain Cretace superieur.' 



As the lithological characters of the Chalk-marl exhibit a change 

 in passing from Cambridgeshire into Norfolk, it is not surprising to 

 find a corresponding change in the relative abundance of the fossils 

 which occur in this subdivision. Thus in Cambridgeshire and the 

 Midland counties, where the greater part of the Chalk-marl is 

 really a marl, Holaster suhglobosus is a very rare fossil, so rare that 

 neither of us has yet found a specimen ; in the " Inoceramus-heds " 

 of Hunstanton it is exceedingly common, and it also occurs occa- 

 sionally in the overlying beds below the Totternhoe Stone. Similarly 

 Lima echinata which was first described from the Totternhoe Stone 

 of Burwell, and has not yet been found in the Chalk-marl of 

 Cambridge, becomes a common fossil where this Marl puts on the 

 rough and rocky facies in West Norfolk, and is especially frequent 

 in the lnoceramus-\>Qd^,. 



On the other hand, Rhynclionella Martini, which is such a common 

 species in the Chalk-marl of more southern counties, becomes so 



