274. ANIMAL REPRODUCTIONS: 
except one, exhibited a principle of reproduc- 
tion. 
More fnails died in June; 4nd on the 14, of 
all the fixty-eight deprived of the head and part 
of the neck, not one remiained ative. 
With the 28 decapitated, without injuring’ 
the other parts, it was very different. Only 
one had died twenty-four days after decapitation < 
and the originating horns of almoft the whole 
were budding; or, indeed, the rudiments of the 
head ; and the regeneration of fome was complete 
in the beginning of June, for they ate lettuce pre- 
fented to them. 
St was much more credible, that reproduction 
of half the head. would be eafier obtained. The 
Abbé terminates his letter, remarking that, not- 
withftanding the facility of reprodudtion, the head 
of fome fnails-was not entirely repaired during 
the firft days of September ; and’ of the mon- 
ftrofities attending the various generations, 
ene was very fingular : it confifted of two horns 
ef unequal length, fituated on the right fide of 
the head, which, after being always united, and 
as if incorporated together, came at length te 
form a fingle horn thicker and fhorter than a 
large one is naturally. 
Several years after thefe experiments, bed 
when I was thinking little about them, three new 
treatifes were publifhed confirming my obferva- 
tions, 
