260 ANIMAL REPRODUCTIONS.. 
tated a number of {nails with a pair of fharp feif= 
fars. Four of twelve died in eight days, and on- 
ly one of the reft furvived: it lived more than a 
year, but without the fmalleft appearance of re- 
production. In the fame month, he decapitated 
other twelve. Some, which he thought had un- 
dergone the operation, {till exhibited the horns. 
complete ;, whence he concluded, that the {nail 
may fo fuddenly retra& the head, that only part 
‘of the {kin or integument is cut off, and thus de- 
ceives the obferver. Thofe, however, lefs alert,. 
and which really. lofe the head, he is: fully con- 
vinced never repair it. 
He continued decollating a prodigious number’ 
ef fnails during 1770, 1771, 1772, 1773, and: 
with nearly the fame confequences.. All died in. 
time without reproducing the head.. If the. fcif- 
{ars feparated only the fkin or horns, thefe parts 
were repaired. 
In the fame year, 1769, M. Valihie de Bo- 
mare publifhed his experiments in the Berne 
Journal. ‘ He repeated Sig. Spallanzani’s expe- 
* yiments along with M. Borie. They have ob- 
* ferved, that decapitated {nails immediately died,. 
“exhaling an intolerable foetor. Of 52, only g: 
‘ were alive in 24.hours ;. and none except thofe 
‘in which the bluntnefs of the knife had made 
‘the cut between the horns and parts of genera- 
“tien, and.did not go through. The horns were. 
* fenfibly 
