206 



THE GEOLOGIST. 



Univalves, Turritella 1. 



Melanea 1. 



Trochus 1, 



Cyrrus 1. 

 Bivalves. Isocardia concentrica. 



55 costata. 



Plagiostoma gigantea, and two others. 



Lutraria lyrata. 



Unio 3. 



Pecten 3. 



Avicula inequivalvis. 

 Pholodomya ambigua. 

 Trigonia costata. 



Ostrea Marshii5 and two others not 



plicated. 

 Modiola plicata. 



,5 gibbosa. 

 Mya calciformis. 

 Terebratula perovalis. 



55 dygona. 



55 globata and others. 

 Grypheea cymbium. 



And in addition to these5 about twenty species of corals. 



6. Situated immediately upon the last named stratumj 

 is a bed of about fifteen feet in thickness, composed, for the 

 most part, of a loose brown earth, with occasional blocks 

 of stone; the only remarkable circumstance appertaining 

 to which is, that in this loose earth are imbedded hundreds 

 of the clypeus sinuatus ; indeed, so abundant are the re- 

 mains of these animals, that wherever this particular bed 

 forms the surface soil, bushels of the Clypei are turned up 

 at each ploughing, and the Gloucestershire bumpkins (who 

 have not studied in the school of geology), will tell us that. 



