504 ME. W. A. E. rSSHER ON THE DEVOXIAN 



cephali survived later." In the same manuscript we find : — " In 

 cutting the Torquay line at Kingskers^yell Station many specimens 

 of Acevvularia, corresponding to those of Ptamsleigh, were found." 

 In a quarry near Kingskerswell Station I obtained Leptceyia inter- 

 strialis, Ortlionota ( Cypricardia) semisulcata, and fragments of Tri- 

 lobitcs. 



In the same limestone mass, east of BuUeigh Copse, the limestone 

 is pale grey and pink, and contains Ortlioceras plentifully ; with 

 this I would compare the limestone on the north of Oddicomhe 

 beach, which is in part red and rich in Ortlioceras and lithologically 

 similar to the rock just mentioned ; both probably belong to the 

 Cuhoides-'beA^. 



From what has been said it will be seen that the bedded lime- 

 stones which succeeded the shelly and coralline bands representing the 

 Eifelian limestone became in places the bases for more uninterrupted 

 coralline growth, and that that growth was locally continuous to 

 the earlier stages of the Upper-Devonian period ; but that from pli- 

 cation aud fracture it is impossible to trace the marks of change in 

 fauna, which during the prevalence of uniform conditions might be 

 very gradual and local. 



§ YI. The Ashprington Yolcanic Seeies. 



It is unnecessary to describe the tuffs, schalsteins, and harder dia- 

 base masses which constitute this series ; that has already been ably 

 performed. We are here concerned simply with the chronology of 

 this long period of volcanic activity. In the first place, we find that 

 the volcanic beds are bounded on the north and south by slates, 

 which are the upper part of the Eifelian slates, as in the vicinity of 

 Totnes and elsewhere. Eifelian limestones occur here and there at 

 the base of the volcanic series, as at Highlands, Weston Parms, &c. 



Slates are occasionally visible in the volcanic area, as at Parker's 

 Barn, where they contain calcareous lenticles, and near Gerston 

 Cross, where they are dark grey and either partly calcareous or 

 accompanied by small masses of limestone. 



In unpublished notes by Mr. Champernowne we find the fol- 

 lowing : — " Tuckenhay Creek, on the west side of the Dart, is along 

 the line of an anticlinal, vrith inversion on the north. A strij) of 

 limestones and shale extends about half a mile on the south side, 

 where one quarry is still worked, very rich in corals.'^ These beds 

 are on the same horizon with those near Galmpton Mill mentioned 

 in the Ashprington paper as rich in GyatlioijhyUum damnoniense, 

 Cysti2'>liyllu'in vesicidosiim, &c.* 



At Endsleigh, Totnes, limestone is visible in almost undistinguish- 

 able association with the volcanic rocks. With this may l)e com- 

 pared the following note by Mr. Champernowne : — " At Hazard 

 quarry, near Sandwell (on south border of the volcanic beds), where 

 the trap overlies limestone dipping iS^. at about 10°, the top beds of 



* Quart. Jourii. Geol. Soc. vol. xlr. p. 337. 



