xvi. SPONGIADM AND ECHINODERMATA. 433 



Siphonia costata. Lam. U. G. Warminster. 



,, pyriformis. Goldf. U. G-. Warminster. 

 Spongia Michelinii. Reuss. L. G. Faringdon. 

 multidigitata. Michel. L. G. Faringdon. 

 ,, raraosa. Mant. U.C. Wilts. 

 Trigeris. Michel. L. G. Faringdon. 

 Ventriculites alcyonoiides. Mant. U. C. Wilts. 

 alternans. Rom. U.C. Wilts. 



bicomplicatus. 0. G. 8. U. C. Wilts. 



flexuosus. Mant. U.C. Wilts. 



radiatus. Mant. U.C. Wilts. 



,, Townsendi. Mant. U.C. Wilts. 

 Verticillites anastomosans. Mant. L. G. Faringdon. 



The extraordinary number of spongiform fossils in the cretaceous 

 system is accompanied by circumstances of much local diversity. 

 The Faringdon gravel deposits shew limited local drift, or merely 

 displacement; the Warminster sand-beds indicate greater distance 

 from shore ; and the chalk fossils probably grew in deeper and 

 more tranquil waters, such as lately yielded to Dr. Carpenter and 

 Prof. W. Thomson flinty analogues, still living in the Atlantic, of 

 the old cretaceous amorphozoa. 



FORAMINIFERA. 



Cristellaria rotulata. Lam. L. G. Faringdon. U. G. Warminster. 



Guttulena, sp. L.G. Faringdon. 



Nodosaria obscura. Reuss. U. G. Warminster. 



Truncatulina. sp. U. G. Warminster. 

 ACTINOZOA. 



Micrabacia coronula. Goldf. U. G. Warminster. 



Parasmilia cultrata. Lonsd. U. C. Wilts. 

 ECHINODERMATA. 



Echinoidea. 



Ananchytes ovatus. Leske. U. C. Wilts. Tilehurst, near Eeading. 

 laevis. Deluc. U. G. Wilts. 

 pilula. Lam. U.C. Wilts, 

 subglobosus. LesTce. L. C. Wilts. 

 Caratomus rostratus. Ag. U. G. Warminster. 

 Cardiaster fossarius. Benett. U. G. Warminster. 



grandis. Benett. U.C. Wilts. 



Catopygus carinatus. Goldf. U. G. Warminster. U. C. Maiden-Bradley. 

 Cidaris arenicola. 0. G. S. U. G. Warminster. 

 clavigera. Kon. U.C. Wilts. 

 Faringdonensis. Wr. L. G. Faringdon, 

 insignis. Gras. U. G. Warminster. 

 sceptrifera. Mant. U. C. Wilts. 

 velifera. Bronn. U. G. Devizes. 

 vesiculosa. Goldf. U.C. Wilts. 



Ff 



