Zoantharia — Corah. 



107 



gemmation, several young growing from the calice of the parent, Corals. 

 several cases of which are shown in the collection {e.g. 11. 2095). GALLERY 



X. 



West Side. 

 Wall- 

 cases 1-6, 

 Table - 

 cases 1-8. 



View of calice, seen 

 from above. 



Fig. 162. — ITemipht/Uum Siluriense, McCoy. Silurian: Wenlock. (Geol. Mag. 

 1887, p. 99. E. F. Tomes.) 



The Devonian Corals occupy the remainder of Wall-case 4 and 

 the whole of No. 5. They belong to much the same types as Wall-cases 

 those of the preceding period, the principal genera being Alveolites, * * °- 

 Favosites, Syringopora, JSeliulites, Aeervularia, and Cyalhophyllum. 



Fig. 163.— Calceola sandalina, Lamk., an operculated coral, a, the inside, 



and b, the outside, of the operculum ; c, the front, and d, the back, of 



calice; e, specimen with operculum closed over cup. Devonian: Eifel 



and Devonshire. (Original.) 



These corals seem, however, to have grown under more favourable 



conditions, and in the Middle Devonian rocks of South Devon they 



