I) 
45 
(la! p a k- Jhis orifice is surrounded by eight filiform appen- 
Jub S> tans loosely into the abdominal cavity. Dr. 
C st ° n says they “ have generally beeu considered 
a ries * but he, as well as Grant and Edwards, doubts such 
^PPosition, and considers them as subservient to the pro- 
tlie^ Qt ^ ideation ; which so far as my observations go, seems 
* U ° St reasonable opinion. I have kept many in oonfine- 
ha v . l ’ an, f watched others from the sea at all seasons, but 
o„ a e De yer seeu those organs develope any thing resembling 
| )f| ’ which are known to be plentifully developed in other 
l 4r s * The abdominal cavity, which occupies by far the 
t Ur f st portion of the polype, opens into the cell, which in its 
• opens into the tubes which traverse the fleshy crust. 
p at) , len tbe polypes of the whole polypidom are fully ex- 
a n .i e< t> the sight is among the prettiest that can be imagined, 
bl ' 
a hi 
Oo ® or y Dearly resembles some aquatic Cactus in full 
ij m with transparent flowers, than a production of the 
a ‘ a l kingdom. 
ej) J* c b polype, though exercising its functions as an inde- 
h 
! '’Dt being, is associated with all the others in the 
of r,s hment of the polype-mass. Beside this community 
iti„ ? Ur * 8 bment, there is also a community of feeling exist- 
*Pc-ci etween *-h e polypes; so that in recent and healthy 
; ;tul 
ens 
’ an ^ irritation made on one is perceived by all. 
If S r adual withdrawal into their cells is the consequence, 
the Wever, the specimen has been sometime removed from 
Potyg 63 ’ au( i n °t Irequently supplied with good water, their 
* 0(1 ?, rs perception and action are considerably lessened, 
'p I ®y finally die in the expanded state. 
• ^ Dnlvm* 1 t C 1) I I is /.V ,, at ■ In I. nn 
s *i(l 6 t )ol yi je *tself is exsertile, and when expanded may be 
hiQjp a be in a natural state. In describing the transparent 
forming the outer wall of the polype, it wa 
o ltit t separated into two layers at the rim of tl 
°( separation forms the base on which the polype rests 
|) 0i , t U separated into two layers at the rim of the cell; this 
in j t °f separation forms the base on which the polype rests 
tell S ., eji P au ded condition. When it has retreated within its 
ha c ’ ( le transparent tunic becomes invaginated “like the con- 
borns of a snail,’’ or like a partial inversion of the 
tog eilj ot a glove; and the edges of the cells are also drawn 
file r, e f * Dto tbe star shaped depressions so characteristic of 
-junior. 
f»o f^ e two groups which occurs in Cornwall is 
* tip Ul 9° n iadce, of which two species only inhabit our shores; 
a ‘U sl | ’ which was found by Dr. Borlase in Mount’s bay, 
WeDn ““ticed as b aving occured, but it was most probably 
0 a ud cast on shore from some ship. Tiie only species 
* Mag. Zool. ctnd liot., vol. J, p.239. 
F 
