188 ANIMALS KILLED {v, 
tremella, and is united to many races that divide 
like itfelf, which in a fimilar manner are linked 
to other fpecies. Reproduétions are not effeéted 
in the fame way in all. One may reduce a po- 
lypus, a frefh water worm, a fea ftar, or nettle, to 
the fmalleft fragments, and be certain that each 
particle will reproduce itfelf. The earth and boat 
worm mutt not be cut in pieces fo fmall when we 
with to obtain reproduGion. If a {nail is decollated, 
a new head will germinate, but the fevered head 
will not acquire a body. Water newts and frogs, 
while tadpoles, recover their tails and limbs when 
deprived of them ; but if mutilated in other parts 
of the body, they perifh(2). No warm bloods 
ed animal is yet known which reproduces ite 
felf when cut in pieces, but animals recover 
large pieces cut away. Duhamel has feen a ring 
of flefh cut to the bone reproduced in a chicken, 
Similar reparations are every day obferved in 
the cicatrifed wounds of men and animals: 
and we have certain evidence of the reparation of 
the 
have a real progreffive motion. From this fome natura- 
lifts fuppofe that it is endowed with animality, or confi- 
tutes a link which conneéts the animal and vegetable king- 
doms, though properly belonging to neither. Other na- 
turalifts think thefe fpecies are real vegetables, but that 
their motion or progreffion is owing to fome mechanical 
means.—T. 
(2) Prodromo fopra le Riproduzioni Animali. 
