NATURAL HISTORY. 63 
On the 22nd of August (1831) I selected a 
brown polype out of a glass vase containing a 
good supply of them, none of which had more 
than seven arms. The individual selected was 
then laid on a plate of glass, with a drop of clean 
water. Having provided myself with a good 
Whitechapel needle, and ground the pointed 
end so as to form a cutting edge, I severed the 
polype obliquely, the superior part comprising 
the greater portion of the head and four arms; 
the inferior part being the tail, and the remain- 
der of the head, with two arms. These pieces 
were then put into a four-ounce phial of water, 
with a few small crustacea (Daphnia and 
Cyclops), where they sunk to the bottom ap- 
parently lifeless. Three hours after the opera- 
tion I examined them (without disturbing the 
vessel), and found them in the same inert state. 
Twelve hours after this, I found the inferior 
piece attached to the side of the phial by its 
tail, with its arms extended in quest of food, 
the superior one still remaining at the bottom, 
but with its arms extended like the other. On 
the 24th, a new tail was completed to the supe- 
rior portion of the polype, and the rudiments 
of additional arms were developed in both; 
they appeared in good health. The third day 
