THE WAVED MUZZLET. 
241 
into sea- water, no immediate change appeared, but after an 
hour or two the tentacles began slowly to move one by 
one backward and forward, and slightly to swell and to 
lengthen, while the mouth partly contracted. Next morning 
it had quite reeovered health and beauty. 
The tentacles were very versatile, constantly changing 
their form. The mouth also was perpetually opening or 
closing, but slowly. 
The animal appears unable to enclose the disk, but the 
tentacles contract individually, when touched, or spon- 
taneously, shortening to mere warts. I have seen the 
animal when several of its tentacles could scarcely be 
distinguished from the general level of the disk-edge, 
except by the coloured rings. 
It would lie rolling about on the sand in a vase, with 
constrictions successively passing up its body, and throwing 
off clear mucus. When put into a hole in the sand it 
would not remain ; being very buoyant, it was soon on the 
surface, the hole gradually filling beneath it. 
It remained in health for a few days, at which period 
the mouth gaped widely, and the lax corrugated stomach 
was exposed ; the tentacles contracted to warts, and, the 
animal being manifestly feeble and dying, I dissected it. 
!Mr. Whitchurch, of Guernsey, reports having found a 
Peachia, which he supposes to be this species, on re- 
peated occasions; it may, however, have been the following, 
lie mentions the interesting fact that the tentacles are 
luminous. 
The Siphonacttnia (= PeaeJna) Boeclcit has so close a 
resemblance to this species, that I am not certain whether 
my specific appellation will not have to be merged in that 
of the Norwegian zoologists. I rely, however, on the 
figure in Faun. Litt. Norv., ii., in which the lobes of the 
conchula are distinctly three in number, and arc square in 
R 
