360 HISTORY OF BRITISH ZOOPHYTES. 
folds. The plaits or folds often unite and form cavernous 
passages through the mass. The cells are small, and on 
both surfaces of the sheet.” (Couch.) 
2. HscHara FASCIALIS, Pallas. 
Hab. Deep water. Isle of Wight, Pallas. 
Much the same as the preceding, but the branches are 
flat and narrow, and regularly subdivided. 
3. HscHARA CRIBARIA. 
Hab. Deep water, in Berwick Bay. 
This seems different from the preceding in form and size. 
In length and breadth it is less than an inch. 
Genus XVIII. RETEPORA, Lamarck. 
Gen. Char. Coral foliaceous, stony, fragile, netted: cells 
opening only on the upper or inner side, short and not promi- 
nent.—Dr. Johnston. 
1. Rererora reETICULATA, Netted Coralline, Rev. Wil- 
ham Borlase. 
Hab. Deep water, Cornwall. 
“ Tixpanding to the extent of two or three inches; more 
or less cup-shaped, waved, uniting: the lobes are oval, 
