322 HISTORY OF BRITISH ZOOPHYTES. 
27, Lepratia InNomINATA, C. W. Peach. 
Hab. On stones and shells, coast of Cornwall, Peach ; 
dredged off Sana Island, Mr. Hyndman. 
Though this pretty little distinct species is found near 
us, I 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. Lepratia semitunaris, 4. H. Hassall. 
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. 
*KEK Wall of the cell roughened. 
29. LEPRALIA UNICORNIS. 
Hab. On 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. 
