602 Proceedings of the Royal Society 
The only Sertularian found in profusion on laminarian blades 
from deep water was S. operculata, which 
seemed to thrive best on the west coast of 
the island. Adhering to a mass of Tuhu- 
laria indivisa from the Minch was a creep- 
ing stem, having a series of horny, ringed 
polyp cells, of a somewhat fusiform aspect, 
with a short, smooth peduncle, the whole 
having the appearance of a Campanidaria 
(fig. 1). They were only observed after 
immersion in spirit, so that the tentacles of 
the polyps could not be counted. Pavonaria 
quadrangularis is not uncommon in the 
Minch, but I only got a single muti- 
lated specimen. Lucernaria auriculata was 
dredged at Paible. In all, thirteen Coelenterata were procured 
from deep water. 
Clava multicornis, 
Hydractinia echinata. 
Tubularia indivisa. 
gracilis. 
Halecium halecinum. 
Sertularia rugosa. 
pumila. 
operculata. 
Plumularia catharina. 
Laomedea geniculata. 
gelatinosa. 
Campanularia integra. 
List of Zoophytes. 
Campanularia verticillata. 
duniosa. 
fig.l. 
Pavonaria quadranguiaris. 
Alcyon. digitatum. 
Caryophyllia Smithii. 
Actinia meserabryanthemum. 
coriacea. 
crassicornis. 
troglodytes. 
Anthea cereus, 
Lucernaria auriculata. 
Thirteen Polyzoa were procured between tide-marks ; and it is 
curious to find that here Crisia eburnea forms the pigmy forests under 
stones, in place of the Sertularia pumila of the east coast of Scotland. 
A very abundant Lepralia in the same region is L. verrucosa. 
From beyond low-water mark there were thirty-six Polyzoa. In 
one instance, no less than three cups of Tubulipora patina grew one 
above another. Grisidia setacea was very abundant on laminarian 
roots, forming dense, snowy tufts. More than a third (seventeen) 
of the total number were Lepralim. One of the richest fields for 
these and other marine productions not destroyed by drying was 
