﻿Vol. 6 1.] SEQUENCE IN THE BRISTOL AREA. 203 



(42) ' Lithostroiion junceum ' ; ? 



(42) ' Lithostroiion affine ' ; A; Lithostroiion Martini (mut.). 



(44) ' Ehynchonella pugnus ' ; C. 



Zoi\' siuz-Li-Subzone. (Beds 31 to 35 and Beds 46 & 47.) 



(31 & 34) ' Lithostroiion irregulare ' ; A ; Lithostroiion irregitlare and L. 



Martini (mut. towards L. irregnlare). 

 (33, 35, & 47) ' Cyathophyllum regium' ; A. 



(35 & 47) ' Cyathophyllum Stutchburyi and C. Murchisoni ' ; A ; Cyatho- 

 phyllum Murchisoni. 

 (33) ' Lithostrotion ensifer ' ; A. 

 (33 & 47) ' Lithostrotion Martini ' ; A. 



(33) ' L/ithostrotion basaltiforme ' ; C 2 ; 1 probably Lithostrotion 



(47) 'Lithostrotion camea' (? Aranea) ; C 2 ; J Portlocki, which teems 



at this horizon and is well represented 

 in the collection, but not cited in the 

 paper. 

 (47) ' Lithostrotion M' ■Coyanum' ; ? 

 (33) ' Lithostrotion junceum' ; ? 

 (33 & 47) ' Lonsdalia floriformis ' ; A. 



(33) ( Aulophyllum fungites' '; C; 1 probably denote members of 

 (33) ' Clisiophyllum coniseptum ; C ; J the Di'bunophyllum-turbinatum 



group. 

 (33) ' Alveolites depressa ' ; A ; Alveolites septosa, var. 



(47) ' Campophyllum Murchisoni ' ; 1 ; (no specimens are so labelled ; 



the ones that I have noticed are from 

 Bed 44). 

 Horizon e. 



(48) ' Spirifera rhomboidalis ' or ' convoluta ' ; C 2. 

 (48) ' Cyrtina septosa ' ; 2. 



(48) ' Producta Martini '; 02; ] probably Productus aff. scabri- 



(48) ' Producta longispinosa '; 02; j cuius. 



The following corrections of my own observations seem to be the only ones 

 that can be reliably deduced from Stoddart's paper, and from the fossils in 

 his collection which are adequately horizonecl : — 



I. The following brachiopocls probably occur in the Modiola-Zone below 



Horizon a : — 



(4) Lingula sp. ; (Discina) sp. ; Orthotetes crenistria ; Chonetes cf. 

 hardrensis ; (2 & 4) Spirifer sp. or Syringothyris sp. 



II. Productus bassus may extend nearly up to Horizon (3. 



(A specimen in the collection is labelled ' Below the Black Rock.') 



III. Michelinia possibly extends up into the Seminula-Zone (S x subzone). 



(b) Introduction to the Sodbury Carboniferous 

 Limestone. 



Chipping Sodbury lies about 11 miles in a direct line east 30° 

 north of the Clifton Suspension-Bridge. 1 



The exposures from which the following account has been derived 

 are: — 



(1) The railway-cutting on the new South- Wales Direct Line. 



(2) The two large town-quarries at the west of the town, north of the 



Bristol road. 



1 The Suspension-Bridge is chosen as the point from which all distances in 

 this account of the Bristol area are measured, because it spans part of the Avon 

 section. The rocks upon which it rests belong to the upper part of the Seminula- 

 Zone, in the repetition of that zone caused by the Great Fault. 



