TAB. LI. 



CORALS FROM THE DEVONIAN FORMATION. 



Cyathophylltjm helianthoides (p. 227). 



Fig. 1. Transverse section of a simple corallum, from Torquay, belonging to Dr. 

 Battersby; natural size. 

 la. Transverse section of a compound corallum, found at Plymouth by Mr. 

 Pengelly; natural size. 



Cyathophyllum c^spitosum (p. 229.) 



Fig. 2. A fractured specimen, showing the structural characters ; natural size. From 

 Torquay, Dr. Battersby's collection. 

 2a. A transverse section of some of the same corallites, somewhat magnified. 

 23. A poUshed slab, showing a transverse section of a specimen from Teignmouth 

 beach, belonging to the collection of Mr. Bowerbank. 



Heliophyllum Halli (p. 235). 



Fig. 3. Transverse section of a specimen from Torquay, belonging to Dr. Battersby; 

 double the natural size. 



