﻿86 



ME. S. S. EUCKMAN ON CEETAIN 



[Feb. 1 910, 



The following Table shows Mr. Thompson's results, summarized 

 and compared with details of Yorkshire and Gloucestershire strata, 

 while at the side is placed the zonal classification which appears to 

 be necessary for future work :- — 



Table V. — Comparison of Toarcian Deposits. 



Gloucester. 



shire 

 generalized. 



Northamptonshire, 



from Mr. Beeby 



Thompson's MS., 



summarized. 



Yorkshire, 



based on 



Simpson 



(& see Table 



IV, p. 84). 



Zonal or 



hemeral 



terms. 



Lilli beds, or lower 



part of Cottes- 



wold Sands. 



Upper Leda-ovum or 

 lilli beds. 





r 



Oyster Bed. 





s Middle Leda-ovum 

 1 Beds. 



The bifrons 

 or 



S q 



? Lower Leda-ovum 

 « Beds. 



communis 

 beds. 



Unfossiliferous beds 

 or fibulatum zone. 





h2 

 O 



"S 2" ' Communis bed 



z*T£. 15 or subcarinatum 



£> "pj^ zone. 

 



lilli 



The lower part 



onlj' of 



Simpson's 



Division 1. 



: ; 'imnv.m. 



fibulatum. 



subcarinatum. 



Division 2, 

 Division 3 



r" c overturn.' 



Division 4 with 

 A. ' ovatus.' 



The falcifer, | |^ falcifer bedg> 



or serpentmus, o^K 



or — — — 



fish-and- Fish-beds or 



insect beds. latescens zone. 



Divisions 5 & 6. 

 A. mnlgravius. 



falciferum. 



Division 7 with exaratum. 

 A. c.varattis. 



The Lept&na 

 Beds. 



Paper Shale. 



Division 8 with 

 A. tenuicostatus. 



tenuicostatum* 



acutum layer 

 on top of 



Marlstone. 



acutum zone. 



? Top of Ironstone 

 Series, if present. 



aciitum. 



