316 HISTORY OP BRITISH ZOOPHYTES. 



arranged in a circular manner round the base, but smooth 

 towards the aperture. It varies a good deal, but generally 

 there is a mucro on the upper lip, and five or six short 

 spines on the lower lip. It seems not uncommon. 



21. LEPRALIA PEDIOSTOMA, A. H. Hassall. (Plate 

 XVIII. fig. 67.) 



Hab. Dublin Bay and Plymouth Sound, Hassall ; Cornish 

 coast, Peach ; Berwick Bay, rare, Dr. Johnston ; Exmouth, 

 Rev. T. Hincks ; coast of Ayrshire and of Arran, common, 

 D. L. 



This is a handsome and very distinct species, with large 

 cells, the walls of which are either pitted or spotted, the 

 spots being the punctures covered with a thin membrane. 

 It grows in considerable patches. Dr. Johnston mentions 

 that it is sometimes of a light crimson-red, or sometimes 

 of a pure white colour, often with a glossy lustre. It has 

 the glossy lustre with us, but it is never crimson-red, and 

 seldom pure white : it is often light grey, and more fre- 

 quently a pale lilac. 



22. LEPRALIA VERRUCOSA, W. Sean. 



Hab. Near Scarborough, rare, Mr. Bean ; Dublin Bay, 

 Miss Ball; Cornwall, Mr. Peach. 



This is thought by some to bear some resemblance to 



