THE GEOLOGICAL AGE OF CENTEAL AND WEST CORNWALL. 179 



7. Sclerodtfs pusiuliferoKS — Polruan, Couch. 1850, 



8. Sjjhagodus pristodontus — Polperro, &c., Peach 1844. KLudhio 



species according to Murchisou. 



9. Cheiracanthus sp? — Polperro, Peach 1847. 



10. Scaphaspis Cornuhicus — (E-ay-Lank.) — Lantivet Bay, Kay 



Lankester, 1869. See Peach, Trans. E.G-.S.C, x. 94. 

 Said by Ray-Lankester to occur also in the Lower 

 Devonian of the Eifel. 



11. Phyllolepis sp. — Looe ? Lantivet Bay? Pay-Lankester, Pal. 



Soc, '869. 



12. Pteraspis sp. — Lantivet Bay, Ray-Lankester, loc. cit. 



13. Fish remains have also been found at Cliff in the parish of 



St. Veep. "Very excellent specimens" according to 

 Mr. Pengelly. 



The geological horizon of the Looe Beds appears to be 

 fixed by Mr. Eay-Lankester's determination of Scaphaspis 

 •Cornubicus, and by what Mr. Davidson says* of Spirifera 

 Barumensis, {No 17. p. 175, supra). 



" This species has been found by Kayser in the Rheinischen- 

 Taunus Quartzytes, which he has determined to constitute the 

 Loicest Devonian beds. His paper, with plates, may be found in 

 the " Neue Beitrage zur Kenntniss der Faune der Rheinischen- 

 Taunus Quartzyten " which is published in the "Preuss. 

 geologischen Landesanstatt for 1883." This, therefore, gives a 

 base line of undou.bted accuracy from which we may proceed to 

 infer the age of adjoining strata. The Fowey Beds appear to 

 be at least 4000 feet lower than the Looe Beds, as will be seen 

 from the following considerations. The latter strike inland from 

 Polperro towards Lostwithiel, i.e. in a north-westerly direction ; 

 and a perpendicular to this line from Fowey across the strike 

 measures over three miles. So far as we are aware, there is no 

 inversion of the strata to the N.E. of Fowey, and the average 

 amount of dip can certainly not be assumed as less than 15°- If 

 therefore there be no overturn — for the assumption of which 

 there is not a particle of evidence — the vertical thickness of the 



* In a private communicatiou under date October 16th, 1883. 



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