THE SEA ANEMONE. Byé 
2 Place the cork, with the animal on it, in a saucer, and 
cover with water. Examine with a dissecting mi- 
croscope. Notice the digestive, or gastric tube extend- 
ing from the mouth half way down the animal. 
Below it notice the convoluted craspeda, margining 
the mesenteries. 
4. Lift the edge of the gastric tube with the forceps, and 
notice that it is fastened down to the body-wall by 
the mesenteries. Cut these with a knife close to the 
gastric tube, which should be then turned back over 
the tentacles. Notice the yellow, or red, reproduc- 
tive organs, on the mesenteries. 
Snip off with the scissors one of the tentacles ; lay ib 
on a glass slide in a drop of water; put on a cover- 
glass, and gently press it down with the handle of a 
mounted needle. Observe the internal substances 
escaping through the terminal pore of the tentacle. 
Examine with the microscope, using first the inch, 
and afterwards the quarter-inch objective. Notice 
the olive coloured granular corpuscles of the nutritive 
fluid (chylaqueous fluid), and the elongated elliptical 
thread-cells. Some of the larger corpuscles contain 
oil globules. The thread-cells are transparent and 
colourless ; careful examination will show the filament 
coiled up inside some of the cells, while in others it 
will have been shot out. 
6. With the scissors snip off a small portion of one of the 
craspeda, and with the forceps place it in a drop of 
water on a slide. Cover, and examine with the 
quarter objective. Notice the thread-cells similar to 
those in the tentacle, 
7. In the same way examine a portion of the reproductive 
organs. If these are mature, either ova or sper- 
Ot 
