306 - HISTORY OF BRITISH ZOOPHYTES. 



5. LEPRALIA SIMPLEX, G. C. Hyndman. 



Hab. On various bivalve shells dredged at Sana Island, 

 Mr. Hyndman, apparently not rare. 



This resembles L. Jiyalina, but it is more bunchy, and it 

 has a raised and somewhat thickened rim. There is a blunt 

 knob behind the margin of the upper lip. 



6. LEPRALIA VENTRICOSA, A. R. Hassall. 



Hab. Dublin Bay, Mr. Hassall; Cornwall, on old bivalve 

 shells, Mr. Peach; Newhaven, Dr. Greville; Sana Island, 

 Mr. Hyndman; near Irvine, D. L. 



I have a good specimen of this, got at Newhaven by Dr. 

 Greville, which has enabled me to name a specimen got on 

 the inside of an old Buccinum, undatum, betwixt Saltcoats 

 and Irvine. The colour, like that of Dr. Johnston's and 

 Dr. Greville' s, is greyish-white ; whereas Mr. Hassall' s spe- 

 cimens, when dry, were brownish and glistening. The 

 cells are ovato-globose, narrowed anteriorly, with a mucro 

 in the centre of the proximal margin. Capsules globular 

 and roughish. 



7. LEPRALIA HYNDMANNI. 



Hab. On the inner surface of an old shell of Pecten 

 opercularis, and on other shells, dredged at Sana Island, 

 Mr. Hyndman. 



