ETHERIDGE DEVONIAN EOCKS AND FOSSILS. 583 



In the Ashholt, Adscombe, and Stowey quarries I obtained the 

 following: fossils : — 



Alveolites suborbicularis. 

 Heliopbyllum Hallii. 

 Endophyllum abditum. 

 Acervularia. 

 Favosites cervicornis. 

 reticulata. 



Cyathophyllum csespitosum. 

 Stromatopora concentrica. 

 Atrypa desquamata. 

 Petraia. 

 Heliolites. 



The entire thickness of the limestones could not be determined, 

 owing to their forming the base or floor of the quarry ; but they are 

 more massive and less regularly bedded than those of Adscombe 

 and Over Stowey to the north. These slates and limestones belong 

 to the Middle Devonian, or Ilfra combe, group, and are the same as 

 those wliich range from Widmouth, Combe Martin, Lee under ;N"ut- 

 combe, and Westleigh &c., and then strike across the country south 

 of Exhead, Dure Down, Black Barrow, and on to Treborough and 

 Nettlecombe. They are the lowest limestones in the North Devon 

 and West Somerset area; but it must be borne in mind that no- 

 where in North Devon are the limestones exhibited on so gigantic 

 a scale as in South Devon, being, west of the Quantock Hills, 

 chiefly, if not entirely, interstratified with the slates in thin 

 lenticular masses and bands, but nevertheless alwaj^s yielding 

 the same corals, though apparently not so large an assemblage of 

 moUusca. 



A section crossing the Quantock Hills from the village of Crow- 

 combe on the east, over the Fire Beacon to Over Stowey, Eadlet, 

 and Ashford, and thence to the slates and limestones of Cannington 

 Park, will show the succession of the Lower red sandstone and 

 grits, or the Lynton series, and the Middle, or Combe Martin and H- 

 fracombe slates and limestones ; and if the higher members of the 

 Middle group, or the equivalent of the Morte series, are present here, 

 they are buried beneath the New Eed Sandstone which abuts against 

 the slates of Over Stowey, and which constitutes the plain sur- 

 rounding the Devonian outliers at Radlet, Charlinoh, Ashford, and 

 Cannington. The annexed section (p. 584) will give the succession. 

 I regard the structure of the Quantock Hills as essentially the same 

 as that of the north part of North Devon. The base, or western side, 

 or escarpment, is composed of coarse red, grey, green, and yellow 

 saccharoid sandstones, flaggy and micaceous in places, which, as 

 they ascend higher in the series, become slaty, being again succeeded 

 by a higher series of red gritty sandstones and slates, agreeing 

 in every particular with the higher portion of the grits and slates as 

 exposed in the Lynton area above the Yalley of Eocks,andatWoodabay, 

 Trentishoe, Heddon's Mouth, and the Hangman, and with the beds 

 occupied by Seven-Wells Wood. The limestones of Doddington, 

 Adscombe, and Over Stowey represent the Combe Martin and Ilfra- 

 combe series, being, however, much thicker and more extensively 

 developed than the limestones at Combe Martin, and rich in organic 

 remains, although few have been obtained. 



Whether the New Red series on the east, towards Bridgewater or 



