Yol. 52.] ASSOCIATED BEDS, IN N. DEVON AND W. SOMERSET. 



263 



strongly of thePickwellDown Sandstones 

 than of any found in the Morte Series, 

 and, like the former, they contain an 

 abundance of detrital mica. The slaty 

 beds in the Ilfracombe Series also are 

 often highly micaceous. It is neces- 

 sary to bear these facts in mind, for 

 though on the northern side of the 

 Ilfracombe trough, as at Combe Martin 

 and the Hangman Hills, the beds are 

 as little changed as they are on Pickwell 

 Down, yet on the southern side, near 

 the great fault, they are often so much 

 crushed and broken that the superficial 

 likeness is not at once evident. More- 

 over, the lowest beds are nowhere seen 

 in this area. On Mullacott Hill there 

 are several quarries which have yielded 

 fossils, but that which has yielded most 

 specimens is on the right side of the 

 road leading from Ilfracombe to Morthoe 

 Station, and less than | mile south of 

 the Ilfracombe Cemetery. The beds of 

 purplish, greenish, and yellowish slates 

 dip at an angle of about 70° to E.S.E. 

 On the northern side of the quarry large 

 Lingulce are fairly plentiful, but the 

 majority of the other fossils were found 

 in the beds on the southern side. They 

 comprise Stricklandinia Virata (some 

 specimens of very large size), Orthis 

 rustica, Rhi/nchonella Stricklandi, a 

 new Pterincea, Cardiola interrupta (?), 

 encrinites, fragments of a crustacean, 

 etc. The horizon indicated seems to 

 be the base of the Wenlock. In the 

 valley east of this quarry, which sepa- 

 rates the Mullacott from the Shelfin 

 ridge, there are several outcrops of the 

 slates, and these have also yielded 

 fossils, chiefly Lingulce. In some 

 quarries in Shelfin Wood, on the north- 

 ern side of the Shelfin ridge, the slates 

 are covered with markings resembling 

 graptolites in a bad state of preservation. 

 The other fossils found along with these 

 are a few Lingulce, one or two specimens 

 of Stricklandinia lirata, and fragments 

 of encrinites. In searching for fossils 

 in the Morte Slates it must always be 



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