/J 
l 
' 1T Stage. 
Two Blood, - vefels fbi'med in the center, 
Tots, or points of blood, -fur incipient vefsels. 
zf. Stage. 
Tots, in the surrounding membrane 
which shoot into blood-vefsels. 
3? Stape. It 
These take on, a, dela'ndnate figure 
when the head of the chick appears. 
It The three first Stages are from the observations of Tohib HunterTsi/ r 
Skclti 
'cavil pint. 
.London,TuHishecL by JXThorntonTecli.aS06. 
JffvLzel sculp. 
