126 
SAGARTIAD^. 
In the only specimen in -which I have had .an opportunity of examining 
the mouth with exactitude, there was only one gonidial groove, with its 
pair of tubercles. And this was so placed, as to m.ake the bisecting line of 
which it formed the termination, one at right angles to the lateral develop- 
ment of the animal into lobes. 
Acontia. Long and thick ; emitted in great profusion, on the slightest 
irritation. 
Colour. 
Column. Sienna-brown, or reddish-brown on the outer portions, marked 
with bluish longitudinal lines, and gradually melting into the purest white 
on the upper third ; the whole studded with large round spots of the most 
brilliant purplish-rose, which are most distinct in the middle third. 
Margin surmounted by a line of delicate pale scarlet, crowning the parapet. 
Disk. Pure white. 
Tentacles. White, with a faintly-dark core. 
Mouth. White. 
Acontia. Rose-lilac, with the suture, formed by the edges of the 
infolded ribbon, white. 
Size. 
Large specimens attain two inches and a half in diameter, me.asured from 
edge to edge along the curve, as they adhere to the shell ; but the long 
di<ameter of such individuals, if measured from the suture round the ring, 
along the line of the disk, to the suture again, would be not less than five 
or six inches. The height from the parapet to the surface of the shell is 
about one-thii'd of an inch. Tentacles one-third of an inch in length. 
Locality. 
The coasts of Europe generally. Deep water. “ They seem to love a 
muddy bottom, mixed with gravel and dead shells.” (D. R. in litt.) 
Varieties. 
a. Dhodopis. The condition described above. (Plate III. fig. 7.) 
$. Cn7iopis. Whole body pure white ; imspotted (Forbes) ; or marked 
with a few scattered, mostly minute, pink dots.'^(P. H. G.) (Plate III. fig. 8.) 
The name of this genus was assigned to it by the late 
Edward Forbes in honour of John Adams, who first 
described the animal as British. It had, liowever, been 
described and figured by Bohadsch before him, and by 
many since, “ both at home and abroad,” and by no one 
more accurately than Dr. Coldstream, the principal parts of 
whose account are cited in Johnston’s “ British Zoophytes,” 
(Ed. 2, p. 207.) The true character of the animal has been 
