LEPRALIA. 309 
rows of cells. The aperture is small and circular, with a 
hollow tubercle on each side. The ovarian capsules are a 
little punctured, with a perforation on the posterior side. 
11. Lepratia quapripentata, A. H. Hassall. 
Hab. Ireland, Hassall; near Aberdeen, Macgillivray. 
** Wall of the cells granulous. 
12. LeprRaLia GRANIFERA, Dr. Johnston. (Plate XVIII. 
fig. 69.) 
Hab. On slaty rocks, Holy Island, and Berwick Bay, Dr. 
Johnston ; Isle of Man, Prof. Forbes ; Cornwall, Mr. Peach ; 
Saltcoats, Ayrshire, D. L. 
Dr. Johnston thinks this, in some respects, resembles L. 
tenuis ; it bears some resemblance, also, to LZ. hyalina, but 
it has marks that distinguish it from both of them, as will 
appear from the following excellent observations with which 
Mrs. Gatty has obligingly favoured me. 
“The varieties of LZ. granifera figured in the Plate seem 
to demand an explanation. The one marked a, was first 
found on Phyllophora rubens, from Portrune, in Ireland, 
in 1851, and the second variety, 4, was discovered by 
Dr. Greville the same year, on Phyllophora rubens, from 
Sidmouth. The horned variety has since been found at 
Sidmouth also. 
