Correspondence. 



185 



List of Corals from Withycomhe. 



vc, very common ; c, common ; r., rare. 



1. Fenestella antiqua, c. 



2. Stromatopora concentrica, c. 



3. Favosites cervicornis, vc. 



4. Favosites reticulata, vg. 



5. Alveolites suborbicularis, c. 



6. Alveolites (species ?), c. 



7- Syringopora (un described), r. 



8. Amplexus (iortuosus}), r. 



9. Cyathophyllum {Bamnoniense ?), r. 



10. Cyathophyllum Boloniense, vc. 



11. Cyathophyllum ccespitosum, vc. 



12. Heliophyllum Halli, c. 



13. Endophyllum abditum, r. 



14. Cystiphyllum vesiculosum, vc. 



The "Withycombe Corals are of various colours, red, yello-w, grey, 

 and black, and are usually more or less impregnated with iron. Eed 

 and yellow specimens are the commonest, and the latter generally 

 show the structure best, which is also the case with the Carboniferous 

 Corals of Clifton. 



With reference to the shales which occur in the Withy combe 

 Limestone, I may mention that Spirifers are common in the quarry 

 referred to above, and in another, on the left side of the valley which 

 leads from Withycombe to Dumbledear, are to be found examples of 

 Terehratula, Spirifer, joints of Encrinite-stems, and a large species of 

 Cuculloea, but no trace of the Corals of Sandhill Farm. In the 

 Limestone of this quarry there are cavities containing a substance 

 like decomposed manganese. 



I also discovered, in a field upon the same farm (Sandhill), a por- 

 tion of the conglomerate band, which a reference to the Map of the 

 Geological Survey will show to be frequently observable in the New 

 Eed Sandstone of the district. It is visible for a few yards as an 

 artificial section of no great depth, below the surface of the ground 

 that has been worked for farm purposes. The conglomerate at this 

 point abounds in Carboniferous Corals, amongst which I have ob- 

 served Syringopora (ramulosaf), a Zaphrentis, Lithostrotion Martini, 

 and a Cyathophyllum ; also other characteristic Mountain Limestone 

 Fossils. It is singular that Devonian and Carboniferous Corals 

 should be found in such close propinquity. Previous to my ascer- 

 taining the occurrence of the conglomerate at this spot, I had found 

 a specimen of a Carboniferous Syringopora, in a cart-track, beside 

 some Devonian Corals, and was much puzzled, on learning that it 

 belonged to a distinct formation, how to account for its presence in 

 such a locality ; but on the bed being pointed out to me, the mystery 

 was explained. — Yours truly. 



Spenoek Geokge Perceval. 

 Seveen House, Henbuey, Bmstoi,. 



THE LOWER NEW EED SANDSTONES OF CENTRAL YORKSHIRE. 



To the Editor of the Ceological Magazine. 



Sir, — Perhaps the following notes on the so-called Lower New 

 Eed Sandstones, lying between Fountain Abbey and Eipley, may 



