348 ANIMAL REPRODUCTIONS.» 
‘T have fet apart all the fevered heads, atid 
© confidered the whole attentively. I have re- 
‘marked the two large horns with their eyes, 
* the fmall horns, the mouth, the lips, and the 
‘ other parts: I have then feen new horns pro- 
‘trude: I have feen the eyes of the horns, and 
‘ the optic nerve of the eyes: I have feen a new 
* mouth, new lips, and new teeth appear in the 
‘ fnails—in the fame {nails whofe original heads 
‘Thad fet apart. I have feen {nails that gnawed 
‘the covering of a veffel with their new teeth, 
“and void excrements containing the matter 
¢ which they had confumed. What more could 
-* you defire, my worthy friend? And, after fo 
* many proofs, how can you inform me that you 
* ftill retain your philofophic doubt? Can fuch 
‘a doubt, extended fo far, and calling in quef- 
© tion the moft accurate, reiterated, and demon- 
* {trative experiments, be termed truly philofophi- 
‘cal? Confider that the Abbé Spallanzani 
‘and I are not the only obfervers who have 
‘beheld-the prodigies vifible in the reproduc- 
‘tion of the head of the fnail. The celebrat- 
‘ed Signora Bafli, Meflrs Lavoifier, Schaef- 
“fer, Muller, and others, have alfo feen and 
‘ defcribed them. Are you willing to think, all 
* thefe obfervers have been impofed upon ;—thefe 
‘ who have given fuch ample evidence of their 
* ability and accuracy? | 
© With 
