Of the frejh Water Polype* 103 
and to increafe, and many other plants alfo float upon 
the water; the warmth reyives the polypes, and they Ax 
themfelves to thefe plants in queft of prey, at which time, 
they may be taken out of the water with them. 
Of the generation of polypes. 
W HEN a young polype firft begins to fnoot, there 
only appears an excrefcence, which terminates 
in a point e, fig. 387. 
Some time after that, when it appears cylindrical, its 
arms alfo begin to fhoot at its anterior end, c, i, fig. 387. 
Its pofterior end is fixed to the body of its mother, and 
gradually grows narrower, till at laft it only appears to 
adhere thereto by a point b, fig. 388. at which time it i& 
ready to be feparated ; which they all perform in the fame 
manner. The mother and young one fix themfelves to 
the glafs, or other bodies upon which they are fituated, 
with their arms and head, and this is their preparative 
for a feparation ; fometimes the mother gives a twitch, 
at other times the young one, and often both together. 
A polype a b, fig. 389. with a young one c d, ready 
to be feparated, difpofes of its body in an arch of a circle, 
a, b, d, againft the Tides of the glafs. The young one 
being faft to the top of the arch at d, and its head fix’d 
againft the glafs ; the mother only contracts her body, 
which by that means becomes ftrait, as at a b, fig. 3,90. 
which was before circular. While both i to CX Lf.ClTi 1 ClCS 
remain fixed againft the glafs, the young one, which was 
alfo fattened to the glafs, does not follow the mother 
when file withdraws, but remains in its place, and its 
tail d, by. this means is feparated from the htocjy ah? of 
its mother. 
9 
Young 
