i70 THE GEOLOGICAL AGE OF CENTRAL AM) WES'T CORN'WALL. 



5. Cyathophyllum sp. "Fowey, &c., Peach. 1844, Couch 1846. 



6. Favosites cristata {Milne-EdivardH) = F. polymorpha. {Lonsdale) 



V. Brit. Foss. Corals, pi. xli,figs. 3, 3«, 4, 4a.) — Fowey, 

 Punch's Cross, Polruan, Looe, Pelynt, Mellendreth, 

 Bodmin, St. Columb, &c., according to Peach 1844, and 

 Couch 1846, the latter of whom says it occurs in the 

 Aymestry Limestone. 



" This is one of the most abundant corals wherever it occurs, and it is 

 common to many localities ; but in some places it is so obscure that it can be 

 recognised with difficulty. The brown casts are very much injured and distorted 

 from dislocations and compressions of the rock. The colour is a light 

 chocolate-brown ; and the papillary eminences are separated from each other ; 

 they are sometimes very prominent and apparently connected with transverse 

 bands, while at others they are pressed flat ; the substance appears to be 

 minutely cellular. In Devon the specimens represent the entire production, in its 

 external aspect ;— most of the Cornish instances, casts of the interior." — {Couch, 

 loc. cit.) This species is sometimes confounded with F. cervicornis {ililve- 

 Edward s)-^=F. 'polymorf'ha (McCoy), which is decidedly Devonian. F. poly 

 morpha {Phillips), is F. dubia {Milne-Edwards). 



7. Favosites Jibrosa {Milne-Edwards) = Stenopora fibrosa {McCoy) 



V. Brit. Foss. Corals, pi. xlviii, figs. 3, 3«, 3J, and pi. 

 Ixi, figs. 5, 5a. — Polruan, Powey, Looe, Lantivet Bay I 

 Peach 1844, Couch 1846. According to Phillips and 

 Murchison this species ranges from the Caradoc to the 

 Ludlow, but both McCoy and Duncan say it is both 

 Silurian and Devonian. 



" In structure it resembles an Alcyoniiim ; and to which in other respects it 

 seems allied. The tubes are curved laterally from a central axis till they reach 

 the suiface. The surface outline is massive and irregular, the specimen is 

 much compressed. — {Couch, loe. cii.) Milne-Edwards says "we have not 

 remarked any material difference between the specimens found in the Devonian 

 and the Silurian formations, but all these corals are so ill-preserved that we are 

 not inclined to attach much importance to their supposed specific identity." — 

 Brit. Foss. Corals, p. 218. 



8. F. Gothlandica {Milne- Edwards') v. Brit. Foss., Corals, pi. Ix, 



figs. 1, \a. — Polruan, Couch 1846. Murchison gives 

 the range of this fossil as Caradoc to Ludlow, but it 

 it is said to occur also in the Eifel and in the Plymouth 

 limestone. Duncan gives it as Lower Silurian {v. 

 Itep. Brit. Assoc, 1871.) 



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