46 BRITISH FOSSIL CORALS. 



series was commenced. Of these I have ventured to suppress 'Parasmilia Mantelli, 

 Trochocyathus Koeni(/i, and Trochocyaihus Warhurtoni. 



The Coral-fauna of the British area was by no means well developed or rich in genera 

 during the long period during which the Cretaceous sediments were being deposited. The 

 Coral tracts of the early part of the period were on the areas now occupied by the Alpine 

 Neocomian strata, and those of the middle portion of the period were where the Lower Chalk 

 is developed at Gosau, Uchaux, and Martigues. 



There are no traces of any Coral reefs or atolls in the British Cretaceous area, and its 

 Corals were of a kind whose representatives for the most part live at a depth of from 5 to 

 600 fathoms. 



