266 



MK. S. S. EUCKMAX OX 



[vol. Ixxiii, 



160 or 200 feet below, this indicates a movement of the Weymouth 

 antichne to about that extent in order to expose the bed to 

 denudation. But the pebbles ma}^ be very much earlier, and the 

 movement may have been considerably greater. 



(2) Wessexian. 



The name for this age is taken from the Old English kingdom 

 of Wessex, which embraced the South- West of England, though 

 its boundaries diminished and enlarged from time to time, varying 

 more than the boundaries of a stratigraphical term — 3^et, like a 

 generic title, it kept the same name. The Dorset Coast, Somerset, 

 and Gloucestershire, were all part of it at one time, and all this 

 area shows strata of the age. The Eadstock district in Somerset 

 has the strata thinly developed, and therefore not lending themselves 



Table IV. — Wessexiax : Scotland axd England. 





Dates. 

 Hemerse. 







Strata. 









Raasat. 



^ YOEKSHIEE.- 



Cheltenham.'* 



Eadstock.-* Doeset 

 Coast.' 



10. 



valdani .... 



3 





X 



E. 



119 b. Ac. valdani 

 group. 



9. 



ibex 





X 



{Tragopliyl- 



loceras fauna 



oaly) 



X 



(T. ibex 

 fauna only) 



E. 



119 a. 7 A. maugen- 

 118 c. ) esti group. 

 T. ibex & 

 wechsleri. 



8. 



ellipticum . 











118b. Ac. ellipti- 

 cum group. 



Y 









X U. bronni 



+ tine-ribbed 



U.jamesoni 



form 





fll8a. 17. bronni 

 1 forms fand fine- 

 ^ ribbed TIptonia.l 

 1 115 6. U. bronni 







6. PJati/pUu)'0- 

 ceras. 



5. trivialis 



4. jamesoni ..... 



3. pettos 



2. per egr inns ... 



1. Fhricodoceras. 



(Wrigbt). 



E. 



E. 



11 



E. 



J. Bucki 



Coll. 



1^ forms. 



115 a. [Plati/pleur.'] 



113. {Plati/pleur. r] 



111. iPolym. tri- 

 vialis group.] 



110? IC. pettos, C. 

 grenouilloux i .] 

 108. [Polym. 

 pereqrinus ? 

 Haugl.6 

 Deroceratid. 

 105. Fhricodo- 

 ceras. 



1 E. beds in position ; about 30 feet separates tbem. 



- See former Table. About 120 feet involved. 



•^ As in Table III (p. 264) and in Wright's records. 

 " -1 As in former Table. E.=beds in known sequence : X =fauna present, position 

 surmised. 



■'' See former Table. 



•■' ^goceras polymorpTius Wright, pi. xl, figs. 1-3, cited by Haug as near to his 

 snecies. 



