BRITISH ZOOPHYTES. 281 



on stones and shells. The zooecia are elongately oval, 

 with distinct margins from which short ribs proceed a 

 little way towards the centre. There is a distinct 

 peristome with a central sinus^ below which is an oval 

 avicularium. There are three spines on the upper 

 margin of the orifice. The ovicels are rounded and 

 covered with punctures. 



3. S. APFiNiSj Sincks. 

 Lepralia affinis {T. H.). 



Described by Mr. Hincks in Dev. and Corn. Cat., 

 Ann. Nat. Hist., ser. 3, ix., 206, on the authority of 

 a single specimen found by him at Start Bay, South 

 Devon. The avicularium, instead of reaching longi- 

 tudinally downwards from the sinus, as in the preceding 

 species, is placed transversely just below it. 



4. S. CHEiLOSTOMA, Manzoni. 

 Lepralia cheilostoma {Manzoni). 



Hab. : Gruernsey, South Devon, Cornwall (T. fl".), 

 Hastings {Miss Jelly). 



This zoophyte forms colonies of a red colour, turning 

 dull white with age. The zooecia are elongately rhom- 

 boid, regularly dotted with punctures. The orifice is 

 circular, with a peristome having a sinus in the lower 

 margin, within which is a denticle or tooth. There are 

 no avicularia. The ovicels are globose, with a raised 

 areolated border. 



5. S. MARMOREA, Hinclcs. 



Lepralia marmorea {T. H.), ? L. arrogata (Waters). 



Hab. : Cornwall (T. H.), Guernsey {A. 31. N.). 



This species much resembles the preceding, but has 

 a row of distinct punctures round the margin of the 

 zocecium, and an avicularium below the sinus of the 

 peristome. 



