FROM THE ZONE OE AMMONITES BUCKLANDI. 



55 



The endotheca is greatly developed, and consists of small vesicular dissepiments, and of 

 larger masses which stretch across the corallites like tabulae and close in the calicular fossa. 

 Height of corallum 6 inches. Breadth of largest calice ^ths inch. 

 Locality. Chadbury, Evesham. 

 In Mrs. Strickland's Collection. 



Genus — Cyathoccenia. 

 1. Cyathoccenia globosa, Duncan, PL XIII, figs. 8, 9. 



The corallum is nearly spherical. 



The calices are numerous, small, and shallow. They are rarely circular, and are 

 generally rather polygonal in outline, and they are separated by a small amount of ccenen- 

 chyma. There are no costae. 



The septa are stout at the wall and taper off inwardly ; they are subequal, distant, and 

 form three more or less perfect cycles in six systems. 



Diameter of the calices J^th inch. 



Locality. Fladbury, in Drift with Gryplma incurva. 



In the Collection of R. Tomes, Esq. 



The shape of the corallum, the absence of costse, and the shallow calices, distinguish 

 this species from Oyathocoetiia dendroidea, nobis, C. costata, nobis, and C. incrustans, nobis, 

 from Brocastle and the Sutton Stone. 



The following analysis of the genus will enable the diagnosis of the species to be 

 determined readily. 



CyathoccenIjE with the corallum 



branching, having costse C. dendroidea. 



encrusting, without costse, coenenchyma granular . C. incrustans. 



flat, having large costae and a deep calice . . C. costata. 



globular, without costse, coenenchyma plain . C. globosa. 



XIV. List of Species from the Zone of Ammonites Bucklandi. 



1. Montlivaltia Guettardi, Blainville. 



2. Septastrcea Eveshami, Duncan. 



3. Lepidopliyllia Stricklandi, 



4. Isastrcsa endothecata, 



5. „ insignis, 



6. „ Stricklandi, 



7. Cyatliocmnia globosa, 



