326 GEOLOGY OP THE BKISTOL COAL-FIELD. 



21. — [1620]. — Cyrtina led contains good specimens of Cyrtina 

 ieptosa (Day.) ; Spirifera lineata (Mart.), 



[1849]. — Here we come to the end of the quarry, and arrive at 

 the new zigzag path from Clifton Down. At the top of this, on the 

 Dardham Down side, may be taken good examples of Phillipsia, 

 although not plentifully distributed. On the edge of Clifton Down, 

 at the top of the road, is an interesting three inch black bed, which 

 is only here exposed, which we name the 



22.— Belter opho7i led. This limestone is noticeable for allowing 

 the fossils to come away in a perfect state by a blow of the hammer, 

 so that no occasion exists for carrying home a large piece of the 

 matrix, as is usually unavoidable. 



"We now arrive at one of the great points of interest in the Clifton 

 rocks, viz., the remains of a former coral reef. Throughout the 

 next 1290 feet the rocks are entirely filled with the most lovely 

 forms of Zoanthidoe, which, from their large size, must have thriven 

 in the greatest luxuriance in the warm waters of the ancient 

 carboniferous sea. Here may be seen tons of Cyathophyllidoe, three 

 inches in diameter, and of proportionate length' with the tiny 

 Alveolites and Syringopcra, surrounded with the washings of the 

 waves and the entomostraca that usually inhabit such localities. 

 Indeed, here may be exhibited the natural history found at the 

 bottom of a tropical sea. 



23. — [1859]. — Aulophydum led, is a reddish brown limestone 

 with 



Aulophyllumfungites (Edwds,") ; Clisiophyllum coniseptum (Keys.) 

 Lithostrotion coneinnum (Edwds.); Cyathophyllum regium (PhilL). 



24. — \\^^2^^ElUpsolithes led is a thin bed, and is the chief 

 locality in which we can get. 



Ellipsolithes compressus (McCoy.) ; Euompliahs tulerculatus 

 (Thor.). 



25. — [1897.] — Vesicularis led is a good one for this variety of 

 Terelratula hastata, of which it is probably the young. 



26. — [1901]. — Chcdtetes led is the source of splendid examples of 

 the CJicetetes radians. They are very large, and the sections, when 



