of South Devon and South Cornwall. 201 
5. L. concinna, Busk. 
Common: Torbay, on shell, forming large, circular, reddish 
patches; from 40 fathoms, a few miles south of Polperro, on 
stone, &e. 
Mr. Busk gives the absence of spines as one of the distinctive 
marks of this species; two, however, are sometimes present on 
the fresher marginal cells, in sheltered situations. 
[Very abundant on shells, &c., off the Isle of Man (north)]. 
6. L. verrucosa, Esper. 
Devon, rare; near Polperro, on rock between tide-marks ; 
on stone from 40 fathoms, Cornwall, a single specimen. ‘ Coast 
of Cornwall, near low-water mark, and also in deep water” (C. 
W. Peach). 
[Ilfracombe, between tide-marks. | 
7. L. violacea, Johnston. 
Not uncommon: on shell from the Brixham trawlers, forming 
a cream-coloured crust ; Torbay, on shells. 
8. L. spinifera, Johnston. Busk, Catalogue, pl. 76. figs. 2, 3. 
Common on Laminaria stems and roots: Saleombe, &e. 
The large interlacing roots of the Tangle are the home or 
hiding-place of a multitude of marine animals, and are generally 
rich in Zoophytes. The collector will always do well to “bag” 
as many of them as possible, and reserve them for quiet and 
close examination. The present species is very generally pre- 
sent, and I have seldom met with it in any other habitat. 
[Isle of Man. ] 
9, L. unicornis, Johnston. 
Very common on stones between tide-marks. 
This is one of the most plentiful of the littoral species, often 
covering with its silvery-white crust very large spaces on the 
surface of rock or stone. I have never met with it except in the 
littoral region. 
10. LZ. ansata, Johnston. 
Rare: a few specimens only have occurred, on stones taken 
up from 40 and 30 fathoms depth off the Cornish coast. I 
have had the opportunity of examining the ovicell, which is not 
described by Johnston or Busk, and find that it differs widely 
from that of L. unicornis, yielding therefore another distinctive 
character. It is small, smooth, wanting the radiating grooves, 
and very intimately united to the cell above. 
“On a slaty rock sent from Cornwall by C. W. Peach ” 
(Johnston). 
[On stone from deep water, off the coast of Antrim. ] 
