BRITISH ZOOPHYTES. 263 



the orifice is extended, and bears a large tooth-like 

 projection. The ovicels are mitriform with a beaded 

 margin, and as well as the zooecia, are marked with 

 punctures. 



The colony described had a silvery appearance. 



9. S. BiAPERTA, Michelin. 



Eschara biaperta (JficAeZiri),Lepralia biaperta(-BwsZ;, 

 Manzoni), Reptoporina biaperta {B'Orh.), Hippothoa 

 biaperta and H. divergens (Smitt). 



Hab. : Guernsey {A. M. N.), Hastings [Miss Jelly). 



The colonies are white and glossy. The zooecia are 

 irregularly ovate, sometimes almost square. The 

 orifice is pear-shaped, and on one or both sides of the 

 orifice is a rounded raised avicularium. Here and there 

 amongst the zooecia are round large mamillce bearing 

 avicularia with long beaks. The ovicels are ornamented 

 with radiating lines. 



10. S. ARMATA, Hinchs. 

 Hab.: Polperro {T. H.). 



From the drawing of this given by Mr. Hincks 

 (B. M. P., plate xli., figs. 7, 8) it would appear to be 

 a remarkable and easily recognized species. The cells 

 are large and squarely ovate, granulated, and with a 

 collar- like margin round the orifice, which is circular 

 with a squarish notch at the bottom. On the shoulder 

 of the cell is a prominent avicularium, with occasionally 

 a long duckbill-shaped mandible. Rising from the 

 upper margin of the orifice are four very long spines. 

 The ovicels are globular and slightly wrinkled. The 

 colour of the colonies is grey or brown. 



11. S. AURicuLATA, Hastsall. 



Lepralia auriculata {Hassall, Bush, McA., O.J., B.L.), 

 L. ochracea {T. H.), Escharella auriculata (Sniitt). 



