84 OUR COMMON BRITISH FOSSILS. 



Halysites, Favosites, etc. One common fossil coral is 

 evidently peculiar to this neighbourhood, and has 

 been named by Messrs. Nicholson and Etheridge (who 

 have published a valuable work on the Girvan fossils) 

 Favosites Mullochensis. This fossil coral is also 

 common at Mulloch Hill, near Girvan whence its 

 specific name. Many other fossil corals are obtain- 

 able at Mulloch Hill. 



The Wenlock limestone at Marloes Bay, Pem- 

 brokeshire, contains some good fossil corals. In 

 Ireland, Silurian corals are to be met with in greater 

 or less abundance at Dingle, Bull's Head, Cahercouree, 

 Ardaun, Kilbride, Cong, and Ferriter's Cove. 



The neighbourhood of Tortworth, in Somerset- 

 shire, has long enjoyed a geological reputation for its 

 fossil corals ; Cuttimore's Quarry, perhaps, being the 

 best. The country about Old Radnor abounds with 

 them. The quarries at Mocktree, not far from Ludlow, 

 abound in Silurian fossils generally, and in corals 

 especially ; and the student will be delighted with the 

 lovely scenery of the country round about. 



I have alluded to the corals of the Devonian rocks. 

 These do not weather out or knock out so readily as 

 the corals from the Silurian and Carboniferous lime- 

 stones. The interstices of the Devonian corals, as 

 well as their matrices, are filled in with compact sedi- 

 ment, so that we are forced to cut and polish slices 

 to discover their structures and relationships. Very 

 beautiful is a collection of these polished sections, 



