on a new Marine Animal, 2 4 1 
laterally ; thofe on the belly longitudinally, to fhorten the ani-- 
mal when ftretched out, and to draw it into thefhelL 
The ftomach and inteftine make one ftraight canal : the ante- 
rior end of this forms the mouth, which opens into the grooves 
made by the fpiral turns of the tentacula round the hem of 
each of the cones ; and the inteftine at the pofcerior end opens 
externally, forming the anus. From the contra&ed Fate of 
the animal, the inteftine is thrown into a number of folds. 
On examining the cones and the tentacula, I at fir ft believed 
that the fpiral form: arofe from theirbeing in a contrafted ftate;- 
and that, when the tentacula. were erefled, the cone untwifted,. 
forming a longer cone with the tentacula arifing from its fides, . 
like the. plume from theftem of a feather; and that this ftem 
was drawn imor fljbrtened by means of a mufcle pafiing along, 
the center, which threw the tentacula into a fpiral line, fimilar ' 
to the penis’s of many birds; but how- far this -is really the’ 
cafe, Ihave not been able to afcertain. 
The internal ftru&ure- of this animal, like moft of thofe 
which have tentacula,, is very fmple ; it differs, however, ma- 
terially from many, in having an anus, moft animals of this 
tribe, as the Polypi, having only one opening, by which the ■ 
food is received, and the excrementitious part of it alfo after- 
wards-thrown out ; this we muft have fuppofed, ; from analogy, 
to take place in the animal which is here defcribed, more parti- 
cularly ftnce it is inclofed in a hard ftiell, at the bottom of 
which there appears to be no outlet;. but as there is an anus 
this cannot be the cafe. 
it is very lingular, that in the Leach, Polypi, &c. where no 1 
apparent inconvenience can arife from having an anus, there 
is not- one, while in this animal, where it would Teem to - 
be attended with many, .we find one ; but there being no anus 
in 
