270 



AntediUivian Zoology and Botany. 

 56 



Of the same character is the following specimen, which was 

 detached from its flint envelope. It much resembles, in the 

 quincuncial arrangement of its tubes, Mr. Rose's fig. 100.; 



but ours does not exhibit the 

 pedicle. {Jig. 57., from Nor- 

 wich.) Mr. Koenig appears to 

 have figured this as Ocellaria, 

 Icones Fossilium Sectiles, fig. 98, 

 99. 



Alci/onia, the production or 

 the habitation of polypes. The 

 number of fossil bodies included 

 under the original head of Al- 

 cyonites is much diminished 

 since the families of Spongise, 

 Ventriculites, Choanites, and 

 Siphonise have been withdrawn 

 from this division. They are 

 chiefly limited to the chalk and 

 chalk marl. Messrs. Coney- 

 beare and Phillips conceived that the irregular cylindrical 

 branches often found in the oolitic series, particularly in the 

 great oolite, have derived their origin from ^Icyonia. In an 

 attempt to arrange the fossil Alcyonites, according to their 



