350 
APPENDIX. 
COLOUK. 
Column. Exposed part pellucid white, with the warts opaque w'hite. 
Epidermis. Ochreous drab, slightly darker in some parts, with longi- 
tudinal white lines proceeding from the base, and vanishing a little way 
up. Central star of button formed of alternate whitish and blackish rays. 
Disk. Drab : each primary and secondary radius marked W'ith two 
parallel lines of dark chocolate-brown ; each tertiary radius is similarly but 
more faintly marked, and the space inclosed is in these latter radii drab 
on their outer and white on their inner moiety, the divisions of the two 
colours being marked by a black spot. The space immediately bounding 
the foot of each primary tentacle dark brown. 
Tentacles. Pellucid whitish ; the lower half opaque white on the front, 
crossed by four transverse bars of dusky, the whole (except the lowest one) 
being connected by three longitudinal lines of the same colour, which 
impart a latticed or window-like pattern to the tentacle. 
Mouth. Lip white ; throat white, with black fui-rows. 
Size. 
Diameter of base nearly an inch, of extended column half an inch, of 
flower from one-third of an inch to an inch ; height one inch. 
Locality. 
Lundy Island : on rocks at low water. 
My acquaintance with tliis species I owe to the courtesy 
of William Brodrick, Esq., of Ilfracomhe, with whose 
name I have honoured it. lie kindly sent me a specimen 
in November, 1858, which had at that time been in his 
possession about sixteen months, liaving been taken with 
another individual in the summer of 1857. Its habit is to 
remain on an exposed stone, without any disposition to 
roam : it is generally closed by day, or if open the column 
is contracted ; but it elongates in darkness. It is very 
timid, and cannot on this account be fed : the slightest 
touch of the tentacles I found to be followed by an instant 
clo.sing. The light of a candle, concentrated by a lens, 
presently causes it to shrink and contract. 
gausapata. 
Brodiucii. 
troglodytes. 
