ANIMAL REPRODUCTIONS. 323 
fix themfelves there; and it is neceflary, for 
forcing them out, to.re-immerge them in the wa- 
ter. Notwithf{tanding privation of the head, they 
_ advance forward as if they had one, only their 
progrefs is a little flower. 
At firft, I-decapitated only.a dozen of {nails, 
which was on the 8 of May 1777. I repeat, and 
it cannot be too often repeated, for I am.earneft 
to obviate the moft trivial objections, that deca- 
pitation has never been .efteemed complete but 
when I-had the head entire, and accompanied 
by all its appendages, on my tablet. The heads 
fevered in this manner were ranged together 
along one fide of my tablet, where they ftill re- 
main. 
Let us proceed, in the next place, to de- 
{cribe the wonderful reprodu@ions which fuc- 
ceeded before my eyes. I will not enter into 
minute detail ; it is uaneceflary, for my only pur- 
pofe is to prove the reality of the reproduction, 
in confutation of the detrators of the famous 
difcovery of my friend the Abbé Spallanzani. 
This reproduction does not preferve the fame 
uniformity as that of the head of thofe aquatic 
worms, which I multiplied by fections in the 
‘year 1741, and of which I publifhed an account 
a few years afterwards. he reproductions ot 
_ the fnail prefent a number of varieties, which it 
would be tedious to defcribe. Signor Spallan- 
 , & 2 Zani 
