52 SEMINAL VERMICULI. m 
“ fpecies, very material alterations difguifing the 
© primitive appearance to our view. - A worm 
¢ deftined to live in the waters, and tranfported 
* to our inteftines,. might not perifh, and yet be 
‘very much difguifed, efpecially if introduced 
¢ when young, or under the form of an egg or of 
‘femen ; and if the worm was to propagate, the 
‘ fubfequent generations would be ftill more dif 
* guifed. Let us, therefore, fuppofe that the fe- 
‘ mina of certain infufion animalcula may be in+ 
‘ troduced into the feminal refervoirs by the cir- 
‘ culating dudts: they might be developed and 
“live there. Nodoubt, this new abode, a tems 
* perature and aliment fo different, may greatly 
‘ affect the original. form of the animalcula, and 
“at. length induce changes that may more and 
“more remove them from their firft appearance. 
‘ All mankind had the fame origin. What. va+ 
‘ rieties, what ftriking varieties are there in the 
“human fpecies!. Let us compare the inhabi 
‘ tants of the frigid zone with thofe of the tem 
* perate regions, and thofe of this with the inha- 
‘ bitants of the torrid zone ; and we fhould fup+ 
© pofe we faw. different {pecies of men (1). The 
bi . * femina 
(1) M. Bonnet extends analogy too far: and himfelf 
proves the dangers of analogical reafoning. Whether 
there are actually different races of men on the earth, 
which cannet have had the fame origin, or whether all 
may 
