THE CRETACEOUS SYSTKM 



,</<!. Dicroloma (Perissopti-ra) Mantelli, Avellana cassis, 



Solarium bicuriii.uum. 



Xcttjilc Dentalium niajus. 



Cephalopoda. Schla-nbachia varians, Acanthoceras rotonia;,'! -HMS, 

 Acanthoceras Mautelli, Turrilites costatus, Scaphites 

 ;niii:ilis, Baculites baculoides, Actinocainax plenus. 



Fossils of the Middle Chalk 



Echinodermata. Galerites ( = Echinoconus) subrotundus, Cardiaster 

 pygmsea, Discoidea Dixoni, Cidaris hirudo. 



Fig. 170. OROUP OK LOWER AND MlftDLE CHALK FOSSILS. 



i>. Holaater subglobomis, j. 



li. Turrilites costatus, i. 



c. Inoceramus labiatus, g. 



il. Schlii-nlvicliia varians, J. 



. Khynchonulla Cuvieri, not. tizt, 



f. Mantelliana, J. 



g. Actinocamaz plenus, J. 

 h. Scaphites Eeqiialis, ]. 



Brachiopoda. 



Terebratula semiglobosa, Rliynchonella Cuvieri, Tere- 

 bratulina lata ( gracilis of most authors). 



Lamcllibranchia. Inoceramus labiatus (mytiloides), I. Lamarchi var. 

 Cuvieri. 



Cephalopoda. Mummites nodosoides, Pachydiscus peramplus, Priono- 

 tropis Woolgari. 



Fossils of the Upper Chalk (lower zones) 



Porifera. Camerospongia campanulata, Doryderma ramosum, 



Ventriculites impressus, V. mammillaris. 



