138 



Seriatoporid^ 

 Dendropora Tachypora 



The ZoANTHARiA RTJGOSA attained a greater development in 

 the Devonian than in the Silurian period, and almost entirely 

 belong to the family CYATHOPHTLLiDiE. 



Staurid^ 

 Metriophyllv/m 

 Cyathophtllid^ 



Zaphrentis Pachyphyllum 



Amplexus Chonophyllum 



Lobophyllum Ptychophyllum 



Anisophyllum Heliophylltmi 



Baryphyllum Acervularia 



Hadrophyllum Smithia 



Hallia PhilUpsastroea 



Aulacophyllum Syringophyllum 



Combophyllum Spongophyllum 



Cyathophyllvm Lithostrotion 



Endophyllum Cystiphyllwrn 



Gampophyllwm . Eridophyllum 



The ZoANTHARiA TTJBULOSA are represented by the genus 

 Aulopora. 



Carboniferous Corals. 



The Carboniferous, or Mountain Limestone, contains' a vast 

 assemblage of Brachiopoda, Crinoidea, and Actinozoa. Many of 

 the thick-bedded Limestones of this formation are composed for 

 the most part of the stems and other fragments of the skeletons 

 of Crinoids, or of masses of coralline structure interspersed with 

 the shells of Productoe, Spiriferce, and other Brachiopoda. 



One of the most instructive localities, within an easy distance 

 of the Cotteswold country, is the fine section exposed in the 

 gorge of the Avon, near Bristol, where the Carboniferous 

 Limestone is well seen in its relative position to the Old Red 

 Sandstone below, and the Millstone Grit above; the various 



