﻿226 DK. A. VAUGHAN ON THE PAL^ONTOLOGICAL [May I905, 



(c) The uppermost beds of the Zajohrentis-Zone, including 



Horizon y. These beds are well seen in a quarry east 

 of the Fir Wood, and here Zaphrentis and Caninia 

 occur together in great abundance. 



(d) The lowest part of the laminosa-subzone. This is repre- 



sented by a few beds at the very top of the quarry just 

 mentioned. These beds are pale yellow and highly 

 dolomitic ; they are friable and soft, and do not readily 

 effervesce in acid ; they contain few fossils beyond 

 fragments of crinoids, and will be referred to as the 

 ( laminosa-dolomiies. , 



III. Exposures in Horizon y and the lowest beds of the laminosa- 

 subzone. 

 There are five such exposures, which lie (after making correc- 

 tions for differences of contour) upon a line of strike running 

 west 25° south; the distance between the quarries at the two 

 ends of the line is about Ij miles. They are, tracked from 

 east-north-east to west-south-west : — 



(1) An exposure on the west side of the Portishead road, cut 



into the base of Strawberry Hill under the path already 

 followed. 



(2) The quarry, already described, east of the Pir Wood on 



Strawberry Hill : — Upper resupinata-svibzone, Horizon y, 

 and the bottom of the ' laminos a-dolomites.' 



(3) A roadside exposure on the north side of High-Dale 



Avenue : — Upper part of Horizon y and a long series of 

 the ' laminosa- dolomites,' which here contain bands of 

 Chonetes and Orthotetes at frequent intervals. 



(4) Hangstone Quarry (at the foot of Hangstone Hill) : — 



' Laminosa-dolomrtos ' with bands of the same fossils ex- 

 posed on the dip-slopes. 



(5) A quarry near the Old Church, south of Salthouse : — 



Upper resiqnnata-subzone and Horizon y as well as the 

 lowest part of the ' laminosa-dolomites/ 



TV. Exposures on Court Hill, east of the Portishead road, facing 

 Strawberry Hill on the west. 

 On the crest of the hill Pennant Grit (worked in the large 

 Cony gar Quarries) comes into contact with the Carboniferous 

 Limestone. 



Tracking the beds southward down the slope of the hill (at 

 the foot of which lies All Saints' Church), and then proceeding 

 along the road to Court Farm, the following zones are met 

 with : — 



(a) The resupinata-suhzone, well displayed on the slope 



wherever the rocks are uncovered. 



(b) Horizon y and the ' laminosa- dolomites ' are concealed. 



(c) The Caninia- Oolite occurs behind Court Farm. 

 The sequence is identical with that on Strawberry Hill. 



