﻿Yd. 6 1.] SEQUENCE IN THE BKISTOL AREA. 233 



II. Between the Eailand Area and the Avon Section. 



(J) A quarry near Abbot's Leigh, north of the Portishead road 

 about 1| miles from the Clifton Suspension-Bridge. 



Zap7irentis-Zone. 



Olathratus- and resiqrinata-aubzones. 



In the lower beds of the quarry 



Spirifer aff. clathratus and var. crowd the beds, and are associated 



with the following fossils in great abundance : — 

 Syringothyris aff. cuspidata, 

 Orthotetes crenistria (mut. Z), 

 Leptena analoga, and 

 Chonetes of. hardrensis. 

 Cliothyris Eoyssii (and mut. (5), ~j 



Camarotoechia aff. mitcheldeanensis, ■, 



Productus cf. Martini, and \ are als0 MmmML 



Bhipidomella aff. Michelini J 



In the higher beds 



Zaphrenlis aff. Phillipsi is not uncommon. 



Cliothyris glabristria is abundant, and a single specimen of 



Schizophoria resupinata was discovered. 

 Reticidaria aff. lineata, Productus cf. Martini occur, and 



Chonetes cf. laguessiana is extremely abundant. 



The beds resemble so closely those in the Avon section that no 

 further discussion of this horizon is necessary. 



(2) Exposures near Long Ashton, 1 about If miles south-west of 

 the Clifton Suspension-Bridge. 

 In the grits which are usually considered to form the base of 

 the Millstone-Grit Productus aff. seabriculus is fairly common, 

 affording evidence of Horizon e. 



(B) In the Clifton-Westbury-King's Weston Ridge. 



(1) Exposures on Durdham Downs. 



(«) In the broken ground south of the Reservoir. The lower 

 Seminula-Zone is shown, as evidenced by the following- 

 fossils : — 



Caniniacylindricayzx.bristolensis. I Productus 9. 

 Lithostrotion Martini and var. Seminula ficoidea . 



Syringopora cf. distans. 



Also occasional specimens of Orthotetes crenistria (mut.) and 

 Euomphalus sp. 



(o) In the disused quarry at the top of Pembroke Road, the 

 upper part of the Seminula-Zone is shown, as evidenced 

 by:- 



Seminula spp. 

 Product us ' giganteus. 



Lithostrotion Martini, and 

 an occasional specimen 

 of Clisiophyllum 9. 



1 I have not personally examined the section, but localized specimens are in 

 the collection at University College, Bristol. 



