C 43c ) 
ing once thejieceffity of a proper Nidus for the forma- 
tion of an Animalcle into the Animal of its refpefrive 
kind 5 thefe Obfervations make it probable that the 
Tejies are the Ovaria appropriated for jthis ufe 5 for tho 
the Animalcles coming thither in fuch Cafes may feem 
to be extraordinary, and that ufually the Impregnation 
is in TJtero^ yet it may be collefted from hence, that 
t&e Cicatriculs or Ova to be impregnated are in Tejiibus 
fmmineis 5 for if it were not fo, the accidental coming 
of Animalcles thither could not make them come forward 
more than in any other part of the Body, fince they 
cannot be formed and nourifhed without a proper Ni- 
dus. But 3 . It is acknowledged by all, that the Fostus 
in Dtero for (ome confiderable time after Conception 
has no Connexion with the Womb, that it fits wholly 
loofeto it, and is perfe&ly a little round Egg with the 
Fcetns'm the midft, which fends forth its Umbilical Vefc 
fels by degrees, and at laft lays hold on the Vterus. 
Now from hence it feems evident that the Ckatricula, 
which is the Fountain of the Animalcles nouriftiment, 
does not fprout from the TJterus, but has its Origine elfe- 
where, and falls in thither as into a fit Soil from whence 
it may draw Nutriment for the growth of the Fztus: 
elfeit cannot *beeafily imagined how it ftiould not have 
an immediate Connexion with the Vterus from the time 
of Conception. If you joyn all thefe three Confiderati- 
ons together, viz. that an Animalcle cannot come forward 
without a proper Nidus or Ckatricnla^ that there have 
been frequent Fcetus's extra TJterumy and that they have 
no Adhsfton to the Uterus for a confiderable time after 
Conception, they feem to make it evident that Animals 
cannot be form'd ex Anlmalmlis without the Ova in 
Fxtninis. To all thefe -I (hall fubjoyn the propofal of an 
Exferimentum Cruris , which may feem to determine whe- 
ther the Tejies Foemine& be truly the Ovaria, viz. Open 
the Abdomen of the Females of fome kinds, and cutout 
thefe 
