THE GEM PIMPLET. 
191 
margin like serried teeth. In contraction the surface is thrown into trans- 
verse wrinkles, which of course pass hetioeen, and not across, the waists, and 
thus a latticed or decussate appearance is communicated ; — as if each wart 
were the centre of a little square. 
Disk. Flat or slightly concave ; the outline circular and plane, a little 
overlapping. Gonidial radii strongly developed. 
Tentacles. In four rows, containing 6, 6, 12, 24 = 48; corresponding to 
the lines of warts. They are sub-marginal, thick, moderately long, conical, 
obtuse ; decreasing in size from the first row outwards ; and are generally 
carried arching over the margin, or bent into a double curve, like the 
branches of a candlestick : often, however, they assume a clumsy, thickset 
form, swollen in the middle (see fig. 3). 
Mouth. Raised on a blunt cone. Lip furrowed. Gonidial tubercles 
prominent. 
Colour. 
Column. Rose-pink, varying in brilliance, and often becoming brownish 
towards the summit. Primary warts white, making conspicuous longitu- 
dinal bands, which in the button state form a beautiful radiating pattern. 
Secondary and tertiary warts bluish- or reddish-grey, the former generally 
paler. Quaternary warts generally indistinguishable from the ground 
colom’. Sometimes, however’, the quaternary row which bounds each 
primary on each side is also white (see fig. 3). 
Disk. Ground colour bluish-grey on the outer region, blending into a 
fine yellow-green around the mouth : each radius is bounded by a scarlet 
line, lost at about half-disk; the primary radii are often marked with 
darker and paler portions, sometimes even black and white ; and the result 
is a brilliant kaleidoscopic star, of varied hues, the blue and scarlet lines 
in particular running out among the tentacles. 
Tentacles. Pellucid grey or whitish, the front face 
olive, undefined, and deepening into black in the median 
line, often with a purple reflection : this face is crossed 
by about half-a-dozen large transversely-oval spots of 
opaque white, occasionally interchange.d with more nar- 
row and even linear ones. These spots are well-deflned, 
and, though they vary in the tentacles of the same in- 
dividuals, are never wanting. 
Mouth. Lip whitish : gonidial tubercles grey, each 
marked with a central dot of bright rose-colour. ,, tentacle 
{lateral view). 
SiZB. 
Rarely exceeding an inch in diameter, and an inch and a half or two 
inches in height. 
