160 



HE. S. S. BUCKMAN ON 



[June 1913, 



Time-Table and Comparison 

 Hemerse. 



Table IV. 

 Callovian-Divesian (Oxeoediax) Deposits. 



Strata. 



Yorkshire. 

 f vemoni Oxford Clay. 



1 <s^1 



1 l^^.o'P. 



ucrta lUtiiis ... <is^> 



o .£ ' 

 x " o o 



Midlands, etc. 



No evidence 

 of fauna or 

 deposit. 



rciic/i/ei'i . 



^ lamberti . 



atlileta . 



ornatum 



t_ koenigi 



o*|j 



A trace of the 

 fauna. 



Remarks. 



Maria Zone of 

 Normandy Coast. 





Neither fauna 



nor deposit 



found. 



Well developed in 

 Buckinghamshire 

 Upper Oxford Clay. 



£ Atlileta Zone, Oxford. 

 ^ Perhaps incomplete. 



! t2 Clay with Cosmoceras. 

 j £ Oxford. 



I 55 Meginaldi Bed, 

 I § Trowbridge. 



Trace of fauna in ""\ 

 Kell. R. Wilts. (. 

 Deposit nearly 

 removed. 



Late 



Middle 



Early 



development 



of 

 Cosmoceras. 



Fauna and deposit ") 

 may be present. | 



Kelloway Rock 

 (Leckenby). 



Kellaways 

 Rock. 



Deposit with good 



ReinecJceia fauna, 



Isle of Mull, Hebrides. 



Kellaways Rock. 

 H. B. Woodward. 



Kellaways Clay. 

 H. B. Woodward. 



The foregoiug Table shows that the ' Kelloway Eock ' of York- 

 shire is, in the main, contemporaneous with the Oxford Clay 

 of the Midlands and the South of England, and is therefore 

 later than the Kellaways liock of these parts. It also shows that, 

 according to the evidence of the Oxford-Clay fossils of Yorkshire 

 cited by Fox-Strangways, 1 the ' Kelloway Rock ' of Yorkshire is 



1 The following table shows the zones which the ammonite species cited 

 by Fox-Strangways from the Oxford Clay of Yorkshire may be presumed to 

 indicate; some records have been interpreted: — 



Table V. — ' Oxford Clay ' Ammonite Zones. 



vemoni A. vemoni, A. oculatus (A. cordatus, A. vertebralis = 



Cardioceras spp. may be higher). 



gregarium A. perarmatus=Aspzdoceras hirsutum Bayle. 



vertumnus A. marioe=A. vertumnus. 



renggeri A. crenatus— Creniceras sp. 



lamberti A. lamberti. 



atlileta A. binatus, A. eugenii. 



ornatum A. elizabethas, A. comptoni. 



There is also A. crenularis Phillips, 'Greol. Yorks.' vol. i (1829) pi. xii, 

 fig. 22, probably a Quenstedioccras, and presumably from the lamberti zone. 



