438 TEE CRETACEOUS SYSTEM. CHAP. 



Ostrea canaliculata. Sow. U. G-. Warminster. 



frons. Paris. U.G. Warminster. 



macroptera. Sow. G. Culham. L.G. Faringdon. 



Normanniana. D' Orb. U. G. Wanninster. 



semiplana. Mant. U. C. Wilts. 



vesicularis. Lam. U.G. Warminster. 

 Pecten aequicostatus. Lam. U. G. Warminster. 



asper. Lam. U.G. Warminster. 



atavus. S9m. U.G. Warminster. 



Beaveri. Sow. L. C. Wilts, Pangbourn. 



Dutemplii. D'Orb. L.G. Faringdon. 



elongatus. Lam. G. and U. G. Wannmster. 



interstriatus. Leym. L. G. Faringdon, Seend. 



nitidus. M<mt. U.C. Wilts. 



orbicularis. Sow. U. G. Devizes. 



quadricostatus. Sow. U. G. Warminster. 



quinquecostatus. Sow. U. G. Warminster. 



Raulinianus. D'Orb. L.G. Faringdon. 



striato-costatus. Goldf. L. G. Faringdon. U. G. Warminster. 

 Pinna Galliennei. D'Orb. U. G. Warminster. 



Moreana. D'Orb. U.G. Warminster. 

 Plicatula inaequidens. Sharpe. L. G. Faringdon. 

 Spondylus spinosus. Sow. U. C. Wilts. 



striatus. Sow. U. G. Warminster. 



Few genera but rich in species are recognized among cretaceous 

 monomyaria. Exogyra, a frequent and characteristic genus of 

 lower cretaceous fossils, can be fairly quoted from the Portland, 

 if not Coralline, oolite. 



Spondylus spinosus has changed more than once its generic 

 title; dianchora makes its appearance, and for inoceramus this 

 series of rocks is the capital. 



DlMYARIA. 



Anatina. sp. U. G. Warminster. 

 Area carinata. Sow. U. G. Devizes. 

 Carteroni. O.G.8. L.G. Coleshill. 

 Marcellensis. D'Orb. L.G. Faringdon. 

 Astarte transversa. O.O.S. L.G. Faringdon, Coleshill. 

 Cardium Gentianum. Sow. U. G. Devizes. 

 Ibbetsoni. 0. G.S. L. G. Devizes. 



Michelini. I? Arch. L.G. Faringdon. 

 ,, subhillanum. Leym. L.G. Devizes. 

 Corbula. sp. L.G. Seend. 



Cucullsea. sp. U.G. Devizes. L.G. Faringdon, 

 Cyprina oblonga. 0. G. S. U. G. Devizes. 

 Cytherea parva. Sow. G. Wilts. 

 Diceras Lonsdalii. 0. G. S. L. G. Devizes. 



