416 ANIMAL REPRODUCTIONS. 
The reproducing members of the newt and 
fnail illuftrate, that organic wholes may be com- 
pletely developed without fecundation, in its pro- 
per fenfe. The moft fubtile or aétive fluids of 
the animal are fufficient to effet their evolution. 
Nothing need here be added to what is faid on 
the fubject, Contemplation de la Nature, Chap. 3. 
Part io. 
Although the fame member is mutilated five 
or fix times fucceflively, it will be regenerated as 
often. Probably thefe fucceffive reproductions 
extend further ; but we are yet ignorant of their 
limits. Thefe can be difcovered by experiment 
alone; but it is evident that they cannot be in- 
finite. In the fame frefh water worm, I> for- 
merly faw twelve fucceflive reparations (1). 
The 
(1) Traite d’Infedohgie. ‘It is very probable, that the 
‘ property of thefe infe@s to renew a head or tail, when 
‘ deprived of either, is proportioned to the number and 
‘ nature of the accidents to which they are expofed.’ ' 
In rivulets, I have fometimes feund worms that had loft 
the head or tail, and then repaired it. Snails run the ha- 
zard of fimilar accidents. Muller, at the end of his memoir 
on fnails, Fournal de Phyfique 1778, obferves, that he found 
‘a naked fnail in a wood, and two others, repairing a 
‘ large horn that had accidentally been loft.’ I have had 
uewts taken with deformities in the fingers and toes, 
which clearly indicated oafual mutilations. 
