ANIMAL REPRODUCTIONS, 355 
_ I now return to my experiments on the repro- 
-Guction of the head of f{nails. Thofe whofe pro- 
grefs I mentioned in the firft part of this Treatife 
died before finifhing the reparation of the head. 
They became much emaciated, and affumed a 
tranfparence which is unnatural to fnails. One, 
whofe ahterior part is reprefented, fig. 12. repro- 
duced a large horn only, about a line in length, 
but much thicker than a large horn beginning to 
protrude, fig. 15. c. This fingular horn, which 
feemed to be formed like a kind of {pindle, had two 
eyes, fig. 12, 0, 0, very diftiné, and each with its 
optic nerve: The whole is magnified, fig. 15 : the 
part reproduced, which is always lighter than the - 
original flefh, is indicated by the flight fhading. 
On clofe examination of the horn, it was imme- 
diately difeovered to be formed by the union of two 
horns, which were as if ingrafted on each other. 
There was no mark of a mouth, nor were the 
fmall horns perceptible in this fnail: therefore, 
how can there be any doubt of ae decapi- 
tation (1)? s 
In fpring 1778, I refumed thefe experimenis 
on different fpecies of fnails. ‘Their different re- 
productions prefented varieties fimilar or analo- 
gous to thofe that I had obferved in the {nails de- 
capitated the preceding year. One among them 
refembled that which is juft mentioned. Two 
Z 2 eyes 
(1) There is here fome inaccuracy in the original, 
which I am unable to correét.—T. 
