ASTR.^ACEA. 
BUNODIDJi. 
I 
THE DIADEM PIMPLET. 
Bunodes coronata. 
Plate VII. Fig. 4. 
Specific Character. Warts almost confined to ujiper half of column, in 
lines and irregularly scattered ; sub-equal, small. 
Bunodes coronata. Gosse, Annals N. H. Ser. 3, ii. 194. 
GENERAL DESCRIPTION. 
Form. 
Base. Adherent to shells, scarcely exceeding column. 
Column. Cylindrical in expansion, much higher than wide ; covered on 
the upper two-thirds with moderately numerous small warts, neither per- 
forate nor excavate ; they are arranged in twelve longitudinal rows, with 
irregularly scattered ones between ; and are generally wanting towards the 
base. Skin between the warts smooth, and when distended having a satiny 
lustre. AVhole column invested with a thin drab epidermis, deciduous in 
ragged shreds, but adhering pretty firmly. A distinct parapet, with a 
smooth sharp edge, but no appreciable fosse. 
Dish. Circular, flat, but often protruded so as to be convex, or to form 
a low cone ; radii distinct. 
Tentacles. In five rows; 6, 6, 12, 24, 48=96. They are sub-marginal, 
the first row springing at about three-quarter radius ; they are shorter 
than radius, diminishing outwardly, conical, sub-acute. 
Mouth, Large, protrusile : lip sharp : throat evertile, coarsely furrowed. 
Colour. 
Column. A rich orange, or orange-scarlet, with the warts either paler or 
darker than the ground-colour. Edge of parapet cream-white, immediately 
below which the margin is marked alternately with square patches of 
dark purplish chocolate, and narrower spaces of whitish (twelve marks of 
each colour in adults, six of each in young) ; these, from the fine contrasts 
of colour, when the button is not quite closed, have a very striking and 
characteristic effect, as if the animal were surmounted by an elegant 
coronet. 
Bisk. Red, varying from pellucid scarlet to a reddish ehocolate ; each 
mdius bearing a longitudinal central streak of white, which does not reach 
