tm. - SEMINAL VERMICULI. 63 
the former ; and thofe of the latter are not -in- 
habited by vermiculi. 
_. Befides the mother, the aches may ais an in- 
ftrumental caufe in the propagation of vermiculi : 
which may take place with almoft every fpecies 
of animal. This method is at leaft more dire€t, 
or perhaps more natural than the other :, I {peak 
of the act of fecundation, which may convey the 
germs of the vermiculi to the embryo by the im- 
mediate vehicle of the femen. That the eggs of 
females may be impregnated, they muft be be- 
dewed by the fpermatic fluid of the male, which 
muft aét on the included embryo: it fhould a& 
not only externally, but alfo internally: for we 
know that it regulates the parts of the foetus (1). 
Therefore it is neceilary that the foetus fhould be 
penetrated by it; and in this way may the ver- 
micular germs be eafily introduced. Thefe ex- 
pand or lay the foundation of a little colony of 
yermiculi, which take pofleffion of the feminal 
fluid, and give birth to numerous inhabitants. - 
_ The fecond queftion relates to the mode in 
which vermiculi propagate. In thenumber of ex- 
periments, almoft infinite, that I have made, my 
attention has always been directed to this intereft- 
ing point. After feeing a prodigious multitude 
of infufion animalcula multiply by divifion of the 
paises 
1.6 BR thd QS we * awe ‘to 
Ga) Bonnet, Pref. a la Contemplation, 
