THE CRETACEOUS SYSTEM 



343 



Laraellibranchia 

 Ostrea, sp. . 

 Ostrea (Exogyra) sp. 

 Pecten (Neithea) sp. 

 Perna, sp. . 

 Polyzoa 



Diastoporidse 

 Filisparsa ramosa, d'Orbigny 

 ,, fragUis, Marsson . 

 Diastopora compressa, Goldf uss 

 Idmoneidae 

 Idmonea virgula, d'Orbigny 



Distribution in Foreign Beds. 



Jurassic and Cretaceous. 

 Cretaceous to recent. 

 Triassic to recent. 



Turonian and Senonian. 



Senonian. 



Senonian. 



Crisina cenomana, d'Orbigny . 

 ,, excavata, d'Orbigny 

 ,, marginata, d'Orbigny 

 Tervia dorsata, von Hagenow . 

 ,, gibbera, Gregory 

 ,, decurrens, Pocta . 

 Entalophoridse 



Entalophora virgula, von Hagenow , 

 ,, conjugata, von Reuss , 



,, echinata, Romer . 



,, madreporacea, Goldfuss 



Spiropora verticillata, Goldfuss 



Neocomian and Ceno- 



manian. 

 Cenomanian. 

 Senonian. 



Turonian and Senonian. 

 Senonian. 

 Senonian. 

 Cenomanian. 



Neocomian to Danian. 

 Cenomanian. 

 Cenomanian to Danian. 

 Cenomanian to Danian. 

 Neocomian to Danian. 



