"7th. The evident material source of the fluid, as shown by the hydrorrheas of pregnancy, as well as in the exhaustion the mother experiences, in some cases, at least, under its loss and rapid reproduction.
"8th. The entire absence during gestation of any trace of the placenta in certain animals, notably the salamander."
Oratio V, In Matrem Deorum.
De Defectu Oraculorum, xxi.