LEPRALIA. 315 



18. LEPRALIA FIGTJLARIS, C. W. Peach. 

 Hab. On an old bivalve shell, Cornwall, Peach. 



Cells barrel-shaped, flattened on the upper side, which is 

 crossed by small punctures and surrounded by large ones. 

 Thought to be allied to L. annulata. 



19. LEPRALIA BIFORIS, W. Thompson. 



Hab. On Ascidice, Strangford Lough, and on old shells, 

 W. Thompson ; on Pecten maximus, dredged at Lame, E. 

 Patterson ; on a floated piece of the bark of a tree, coast 

 of Ayrshire, D. L. Mrs. Gatty finds a pretty transparent 

 variety on Ph. rubens, at Sidmouth. 



This is a pretty well marked species. The cells are punc- 

 tured round the sides and near the mouth, leaving the 

 middle part smooth, where above the mouth there is a half- 

 moon-shaped hole. The mouth sometimes has a spine 

 on each side; Mr. Peach has found it with three spines 

 on the under lip. The capsules are globose, white and 

 smooth. 



20. LEPRALIA PEACHII, C. W. Peach. 



Hab. On stones and shells, Cornwall, Peach; dredged 

 off Sana Island, Mr. Hyndman; on old shells, coast of 

 Ayrshire, D. L. 



The cells are globose, perforated by oblong punctures, 



