322 HISTORY OF BRITISH ZOOPHYTES. 



27. LEPRALIA INNOMINATA, C. W. Peach. 



Hab. On stones and shells, coast of Cornwall, Peach; 

 dredged off Sana Island, Mr. Hyndinan. 



Though this pretty little distinct species is found near 

 us, T have not fallen in with it on the coast of Ayrshire ; 

 but I have a specimen of it before me, from Mrs. Gatty. 

 The cells are white, ovate, and sometimes almost orbicular; 

 and when the ribs diverge from a central umbo, it is like a 

 Pecten in miniature. " The margin is surrounded by nu- 

 merous long and slender bristles, which are very commonly 

 destroyed." (Couch.) 



28. LEPRALIA SEMILUNARIS, A. H. If assail. 



Hab. Dublin Bay and coast of Norfolk, Mr. Hassall. 



The cells are perforated; the aperture semi-lunar; often 

 with an operculum, and at times with a short spine on each 

 side of the mouth. 



x-x-x-x- J^all of the cell roughened. 



29. LEPRALIA UNICORNIS. 



Hab. OD rocks, and on the roots of L. digitata. 



This is very common on the coast of Ayrshire, on the 

 roots of Laminaria digitata. The cells are disposed in 

 rows, rough and scaly, with a constricted aperture. Colour 

 reddish and sometimes white. 



