106 
SAGAKTIADiK. 
Colour. 
Column. Ground tint a light buff, sometimes merging into a warm fawn, 
or wood-brown, at others into a flesh-hue, or even pale scarlet. This is 
marked with longitudinal bands of paler hue, sometimes almost white ; the 
bands being equal to the interspaces. As these bands approach the base 
they become more defined, and the contrast between the alternate dark 
and light hues is beautifully distinct, especially as they are separated by 
slender jagged lines of very dark brown. The whole upper parts are 
freckled with numerous brown dots ; and the suckers are generally inclosed 
each in a little olive blotch. 
Dish. Ground tint a dull whitish-grey, covered with a regular speckled 
pattern, formed of the following elements. At the point where each 
tentacle springs from the disk, the radius is marked by a long dash of deep 
brown, or blackish, at each edge; the intervening space between the dashes 
is occupied by a transverse band of pellucid greyish-brown ; two other 
similar bands cross the radius at equal distances, but without the bounding 
dashes. As the markings of the secondary radii do not coincide in posi- 
tion with those of the primary, the result is the minutely chequered or 
dotted pattern above spoken of. Go- 
nidial radii often opaque white. 
Tentacles. Translucent grey, marked 
on each side with a line of dark brown 
running through the whole length. 
Occasionally a very faint ring of pel- 
lucid white surrounds the tentacle near 
its middle, and a second just above its 
foot : the lateral lines are lightened at 
these places, but their continuity is not 
interrupted. They end abruptly just 
above the junction with the disk. 
Mouth. Greyish white ; with darker 
[right side). furrows. 
Size. 
Average specimens in the button state are about five-eighths of an inch 
in height, and the same in width of column ; the base covering an area of 
nearly an inch in diameter. Such a specimen in ordinary expansion would 
spread an inch and a half from tip to tip of the tentacles. But specimens 
an inch and a quarter in height and width in the button are not rarely 
met with. 
Locality. 
It is widely scattered over the European coasts. Where found it is 
generally common, adhering to rocks and loose stones, between tide-marks; 
