520 PEOCEEDINGS OF THE GEOLOGICAL SOCIETY. 



specimens I had ever seen of the Hemipedina Bowerhanhii, "Wright, 

 showing all their spines in position. Thecosmilia Michelini, Terq. 

 and Piette, is in great abundance in this quarry, and is found on the 

 same horizon as at Llanbethian ; its position is therefore satisfactorily 

 fixed in these sections at the base of the Liassic series ; and its disco- 

 very at Stout's Hill shows that it continued upwards to the horizon 

 of Ammonites Bucklandi. 



6. Stormy Quarry. — At the Stormy Cement-works the Keuper 

 marls have been exposed in excavating the cement-stone. When 

 compared with the "West of England section, the Rhsetic beds at 

 this spot are very insignificant. A single bed of black marl con- 

 taining Fecten Valoniensis and other Rhaetic shells succeeds the 

 variegated marls, and upon this a dark limestone 4 inches, and 

 next a bed (in texture very similar to the *' White Lias ") 2 feet 

 thick. The Ostrea-beds then follow, and are almost made up of 

 Ostrea liassica and its varieties. Above these succeed rubbly lime- 

 stones with Ammonites planorhis, and with Pecten Pollux, Lima 

 tuhercidata, and Ostrea arietis in the same block with Lima gigantea. 

 The latter beds are identical in their general character with the 

 lower horizon of the South-west of England ; and we may safely 

 assume that at Stormy, Laleston, Llanbethian, and, perhaps, at Cow- 

 bridge the basement beds of the Lower Lias are present. 



7. Section at Ewenney. — Directly at the back of the Brocastle 

 quarry a roadway leads to Ewenney. The Carboniferous Limestone 

 forms its floor. In some small openings along the line, the coralli- 

 ferous conglomerate can be occasionally seen resting upon it. In 

 passing down the hiU towards Ewenney the limestones are disturbed, 

 and large veins filled with crystalline carbonate of lime and conglo- 

 merate cross the road. Not far below, the Lias in the Ewenney 

 quarries may be seen regularly bedded, and abutting against and 

 fiUing a forked space in the Carboniferous Limestone. With the ex- 

 ception of Astrocoenia dendroidea, Dune, and A. reptans, Dune, the 

 interesting fauna of Brocastle is entirely wanting. The upper beds 

 of Lias at Ewenney are about 10 feet in thickness, divided by beds 

 of marl, in which are present Pollicipes rhomhoidalis, Moore, found 

 also at Langan and Shepton. The beds, however, are encrinital, like 

 those which adjoin the conglomerate at Brocastle ; but the same is 

 also the case with the Ammonites- Buchlandi beds at Southerndown. 

 The Lias in the Ewenney quarry is much fissured, and a lead-vein 

 passes through it. At the base of the quarry at the time of my visit 

 the men were extracting stone identical with the upper or finer 

 quahty of the Sutton Stone, and they volunteered the remark that 

 it was identical. It is slightly conglomeratic, and contains minute 

 chert pebbles. Shells in it are very rare, the only one I noticed 

 being a small example of Pecten Pollux . 



The beds putting on the lithology of the Sutton Stone are here 

 only two in number, each of 20 inches in thickness ; and it is curious 

 to observe, as illustrating the local character of the Sutton Stone, that 

 those immediately below return to the ordinary dense and thinly 

 bedded character of those above. 



