Writing on the lower phases of Marine Animal life, he says:--"Indeed,

for my own part, I am strongly of opinion that there is sense existing

in those bodies which have the nature of neither animals nor vegetables,

but a third, which partakes of them both:--sea-nettles, and sponges, I

mean. The Sea Nettle wanders to and fro by night, and at night changes

its locality. These creatures are by nature a sort of fleshy branch, and
br /> are nurtured upon flesh. They have the power of producing an itching,

smarting pain, just like that caused by the nettle found on land. For

the purpose of seeking its prey, it contracts, and stiffens itself to

the utmost possible extent, and then, as a small fish swims past, it

will suddenly spread out its branches, and so seize and devour it. At

another time it will assume the appearance of being quite withered away,

and let itself be tossed to and fro, by the waves, like a piece of

sea-weed, until it happens to touch a fish. The moment it does so, the

fish goes to rub itself against a rock, to get rid of the itching:

immediately upon which, the nettle pounces upon it. By night also it is

on the look-out for Scallops and Sea-urchins. When it perceives a hand

approaching it, it instantly changes its colour, and contracts itself;

when touched, it produces a burning sensation, and if ever so short a

time is afforded, makes its escape. Its mouth is situate, it is said, at

the root or lower part, and the excrements are discharged by a small

canal situated above.