﻿CONCLUSION. 115 



which he had carefully marked every locality from which fossils had been by him dis- 

 covered. He divides North Devon, as have done some other geologists, into the following- 

 five zones : 



Zour I would seem to comprehend the whole of the Linton group proper, 

 extending from the Foreland to the west end of Woodabay, together with the grey and 

 claret-coloured shales and sandstones of Martinhoe and Ilcddons Mouth, and the rough 

 quartzose grits of Treutishoc, Iloldstonc, and the Hangman ; it terminates under the Little 

 Hangman, about the north-east point of Coombe Martin Bay. At the Koreland, two miles 

 cast of Lynmouth, is the anticlinal, and here are the lowest beds of the North Devon 

 series, apparently unfossiliferous. Near Watersmect and Lynmouth fossiliferous bands 

 appear, and from this line all along the Valley of Rocks to Leemouth and Woodabay are 

 abundant fossil remains, the whole unfortunately being imperfectly preserved. Above 

 Treutishoc Town, and across the rough Moorland of Holclstone and the great Hangman, 

 occur blocks of sparry rock, in which are found abundant casts of Natica, Myalina } and 

 other undetermined forms, Corals, &C. 1 



The Linton and Fowev beds in North Devon and Cornwall are considered bv 

 Mr. Salter to be equivalent to the Ardennes-Schicfer, Coblentz-Schichten (or Spirifer- 

 sandstone), Wisscnbach-Schiefer. I was therefore anxious to examine with attention the 

 species of Brachiopoda which could be procured from these so-termed Linton beds. The 

 species, but not specimens, appear to be few in number, and the shells are all in the con- 

 dition of more or less imperfect casts and impressions; and as far as I can judge from 

 those I have obtained from different sources, and especially from Mr. Valpy, who had 

 expressly visited the locality, I could determine only the following few : 



!. Spirifera lalicosta, Lam. — S. ostiolatus, Sclilotli. This appears abundant in the condition of casts 

 and imperfect impressions. 



2. — hysterica, Scbloth. If this shell be properly determined, it is abundant in the state of 



casts and impressions. 



3. Slreptorhynchus umbracidum, Yon Bucb, vel crenistria. Some impressions would appear to be referable 



to this shell, and are in part those which Prof. Phillips seems to have 

 named Orthis compressa, Sow., in his work on ' Pal. Fossils of Devon,' 

 &c. 



4. Orthis sp. This maybe O. granulosa, Phillips, but the specimens I have had were not specifically 



determinable. 



5. Chonetes (Leptcena) sordida, Sow., is abundant. 



Besides these, of which I have seen examples, Prof. Phillips (at page 183 of his work 

 already named) states that he has found Spirifera aperturata at Linton ; but this last identi- 

 fication was, however, made from a very imperfect and uncertain fragment, and therefore 

 cannot be definitely admitted without further evidence. The Spirifers from the Linton 



1 Mr. Valpy informs me that he found this • sparry ' rock, in situ, at West Challacombe, just under the 

 Little Hangman. 



