(47* ) 
three things feem to me very probable, i. That Ani- 
mals are ex Anintalculo. z. That thefe Animalcles are ori- 
ginally in femine Marium & non in Fceminis. j. That they 
can never come forward, nor be formed into Animals 
of the refpe&ive kind, without the Ova in fteminis. * 
The firft of thefe feems probable from thefe three 
Obfervations. i. That fome fach thing has been fo 
often obferved by Malpighius in the Cicatrical* of an 
Egg before Incubation, as the Rudiments of an Ani« 
mal in the (hape of a Tadpole, as may be feen in his 
firft, and in his repeated Obfervations de formations - 
Pulli in Ovo. 2. The fudden appearance and difplaying 
of all the parts after Incubation makes it probable, 
that they are not then a&ually formed out of a Fluid, 
' but that the Stamina of them have been formerly there 
exiftent, and are now expanded. The firft part of the 
Chick which is difcovered with] the naked Eye is, you 
know, the PnnSum /aliens, and that not till three days 
and nights of Incubation be paft, and then on the fifth 
day the Rudiments of the Head and Body do appear. 
This made Dr. Harvey conclude that the Blood had a 
being before any other part of the Body, and that from 
it all the Organs of the Fcetns were both form'd, and 
nourifhed, but by Malpghiuss Obfervations we find 
that the parts are then only fo far extended as to be 
made vifible to the naked Eye, and that they were aftu- 
ally exiftent before, and difcernable by Glaffes. After an 
Incubation of thirty hours are to be feen the Head, the 
Eyes, and the Carina, with the Vertebra, diftinft, and the 
Heart. After forty hours itsPulfeis vifible, and all the 
other parts more diftinft, which cannot be decerned by 
the naked Eye before the beginning of the fifth day ^ 
from whence it feems very probable, that even the fo, 
early difcovery of thofe parts of the Fwtus by the Micro- 
fcope, is not the difcerning of parts newly form'd, but 
only more dilated and extended by receiving of Nutri* 
ment . 
