226 ANIMAL REPRODUCTIONS. 
that, immediately after divifion, they fwell, be- 
caufe they become confiderably fhorter. ‘The fkin, 
where divided, either corrugates fo much that the 
plane of fection is imperceptible, or it enlarges 
to cover the optic nerve and mufcles moving the 
horns. The black eye continues vifible at the 
extremity of the larger horns, after divifion ; 
fometimes, however, it difappears not, but it re- 
mains in the feparated horn: it is retracted and 
buried within, as difleCtion proves. ' 
The parts of feveral animals, we know, con- 
tinue to move and live after feparation, for a 
given time. Such is the cafe with fcolopendre, 
earth and water worms, cut in pieces; but par- 
ticularly, the tails of lizards and water newts, 
which, for fome time, will move, bend, and leap 
about, though cut into feveral parts. But quite 
the reverfe enfues with an immenfe number of 
animals, fo that the members, whenever feparated 
from the body, lofe all femblance of life and mo- 
tion. Snails are akin to thefe. Scarcely are the 
horns cut off when they become motionlefs, or 
are only flightly convulfed for a few feconds. 
No fymptoms of life are afterwards evident, when 
ftimtlated with a point. 
If the mutilated {nails are examined in twenty 
or twenty-five days, it is not uncommon to find 
the rudiments of a reproducing horn. But this 
reproduction is very different from that obferved 
in 
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