nes, these natural
aquariums far surpass any of artificial make. Although the tide drives us
from them sooner or later, we may return with the sure prospect of finding
them refreshed and perhaps replenished with many new forms. For often some
of the deep-water creatures are held prisoners in the lower tide-pools, as
the water settles, somewhat as when the glaciers receded northward after
the Ice Age there were left on isolated mountain peaks traces of the
boreal fauna and flora.

If we are interested enough to watch our anemones we will find much
entertainment. Let us return to our shrimp colonies and bring a handful to
our pool. Drop one in the centre of an anemone and see how quickly it
contracts. The tentacles bend over it exactly as the sticky hairs of the
sun-dew plant close over a fly. The shrimp struggles for a moment and is
then drawn downward out of sight. The birth of an anemone is well worth
patient watching, and this may take place in several different ways. We
may see a large individual with a number of tiny bunches on the sides of
the body, and if we keep this one in a tumbler, before long these
protuberances will be seen to develop a few tentacles and at last break
off as perfect miniature anemones. Or again, an anemone may draw in its
tentacles without apparent cause, and after a few minutes expand more
widely than ever. Suddenly a movement of the mouth is seen, and it opens,
and one, two, or even a half-dozen tiny anemones shoot forth. They turn
and roll in the little spurt of water and gradually settle to the rock
alongside of the mother. In a short time they turn right side up, expand
their absurd little heads, and begin life for themselves. These animal
"buds" may be of all sizes; some minute ones will be much less developed
and look very unlike the parent. These are able to swim about for a while,
and myriads of them may be born in an hour. Others, as we have seen, have
tentacles and settle down at once.

Fishes, little and big, are abundant in the pools, darting here and there
among the leathery fronds of "devils' aprons," cavernous-mouthed angler
fish, roly-poly young lump-suckers, lithe butterfish, and many others.

Moving slowly through the pools are many beautiful creatures, some so
evanescent that they are only discoverable by the faint shadows which they
cast on the bottom, others suggest animated spheres of prismatic sunlight.
These latter are tiny jelly-fish, circular hyaline masses of jel