C ^34 ) 
Monfters of Egypt and other parts of Jfricazxt moftly pro- 
duc'd by a promifcuous venery of Beafls of various 
brought together to rivers by a common thirft. As for 
thofe which happen among creatures of the fame 5^^^?>/, 
he likes not the caufts affign d by any of the Antients but 
rather adheres to the Moderns ; who^, by giveing greater 
light into the nature of Regular concepticns than the An- 
tients could, may alfo much more affift in the explaining 
thofe which are irreg ilar. Wherefore laying down this 
as a Foundation, what Seneca iormt\\)f z^tvitAo{x\itSeed^ 
and what the Moderns have demonftrated by Microfcopes 
more trOly of Eggs; that all the lineaments of the /i^/z^/ -up- 
on conception are there perfeftly drawn ; that the conftitu- 
tioa of the Parents influences the texture of the Fmtus • that 
the imagination of the Female Ypiwed by y-^^ro^j- Experi- 
ment and feveral other inftances^ hath au intereft in fea- 
ture, (hape,and variousmarks ofan otherwife-perfed Gf- 
fpring : he proceeds xoinftr, that even in imj^erfeO: prb- 
du£ts, either any want ofVigour froni the Malej or want 
of Nouriftiment from the Female may caufe aii abbreviation 
or total dcfed of fome Member or other, arid if the fpirits 
of the mother be by an^ accident, (as fear, anger, defi re* 
or afped of fome unufual fhingj difturb'd in thediftributi- 
on ot nourifliment>and as it wer^ called away and imploy'd 
aboutorher obje£ts v the Fabrick of the Embryo muft needs 
bealcer'd, abrupt, Or mifplac't; be deficient, or quite de- 
ftroyed. and if more nouriflimcnt bepour'd in upon the 
tender Fibres than they can bear,, the Fibres muft break 
and monftrous Excrefcencies enfue > or the parts remain 
indiftin(5l and confounded. If the Coats of two ftick 
together, or break into each other ; a Monfter v iih two 
bodies will be born, Thu$ far our Author thought fit to 
entertain his Audiiors about fome general caufes of 
jkrs: 
