328 ANIMAL REPRODUCTIONS 
June, is reprefented fig. 4. and as it was 26 Julys. 
fig. r3.. Something fingular is prefented by 
the large horns: they are thicker in proportion 
to their length than thofe of unmutilated {nails.. 
At the extremity, we remark a kind of deformity, 
which feems produced by a certain plication of 
the flefh, and gives the horns a monftrous ap- 
pearance. However, the eye is very diftinct. 
The colour of the horns tends to violet, which is 
generally the cafe with all reproducing horns, 
and very much refembles that of the nerve tra-° 
verfing the flefh, The mouth is not perceptible ~ 
in the anterior part of another fnail, unlefs as a 
prominence arifing, b, fig. 14. 
I have commonly remarked, .as well as Sig. 
Spallanzani, feveral confpicuous irregularities in 
the reproduction of the double parts of the fame 
fnail. Sometimes a large horn only half or two: 
thirds of the length of the correfponding horn 
appears, or the latter is {carcely vifible. Likewife 
a fmall horn will be completely regenerated,. 
while its fellow is hardly perceptible or not 
at all. Thave feen one half of a lip reproduced, 
and the other fully repaired. 
I may limit myfelf to thefe few examples z: 
they will be fufficient to give an idea of the va~ 
rieties prefented by the regenerating head of the 
fnail. It feems to me, that they infer the repro- 
duftion of one part to be independent of that of 
another = 
