733 b 



ARISTOTLE 



Tov aTrepixaros rcov (f)vra>v^ t] riov l,a)a)v otlovv. 

 25 dvdyKT] yap to ytyvofxevov /cat €k tlvos yivectOai 

 /cat VTTO TLVOS Kat Tt. e^ oi) [xev ovv iarlv vXt], t^v 

 evia jxev ^oia e^^i TrpcoTrjv iv avrots, Xa^ovra" e/c tov 

 uT]Xeos, olov oaa fir] t^cooTOKelTat aAAa OKCoXrjKo- 



TOKeLTai T^ U)OTOK€LTaL, TO. Se pi^XP^ TTOppUi €K TOV 



30 drjXeos Aa/xjSavet 8ta to d7]Xdt,€LV, warrep oaa t,cpo~ 

 TOKeiTai p.rj p,6vov e/CTO? aAAa /cat ivTos. i^ ov p,ev 

 ovv yivcTaL, r] Toiavrq vXrj iaTiv ^T^TeiTai Se vvv 

 ovK i^ ov aAA' v(f)' ov ytVeTai to, piopia. tJtoi yap 

 Twv e^codev tl ttolcZ, 'q ivvTrdp^pv^ Ti iv Trj yovfj /cat 

 CTTTe/jjLtaTt • /cat tout eoTtv r] p-epog Tt ipvx"^? ^ 



^^XV 1 ^X"^^ ^^ ^'^'^ ^^XW- "^^^ H-^^ °^^ e^oidiv 

 TL TTOLeZv eKaoTov i] tcov GTrXdyxycov r) Ta>v aAAoJV 

 piepojv dXoyov dv So^etev KLveZv tc yap pur] dir- 

 Top-evov dhvvaTov /cat pirj klvovvtos Trdax^tv tl vtto 

 5 TOVTOV. iv avTO) dpa tco KV-qpuaTL ivvTrdpx^L tl 

 tJStj ■/}* auTou pLopLov T] Kexo^p^crpevov . to /xev ovv 



^ TcDv <f)VTcx>v Z : TO (f>vT6v vulg. 



* AajSdvra S : Xafi^dvovra vulg. 



^ evvTrdpxov Peck : evvndpxei vulg. 



* rj8rj ^ Y : fj 8-q vulg. 



" The discussion which follows shows that Aristotle fully 

 appreciated the greatest problem of embryological theory, a 

 problem which gave rise to centuries of controversy. Does 

 the embryo contain all its parts in little from the beginning, 

 unfolding like a Japanese paper flower in water (" pre- 

 formation "), or is there a true formation of new structures 

 as it develops (" epigenesis ") ? Aristotle was an epigenesist, I 

 but he was not vindicated till the time of C. F. Wolff and 

 K. E. von Baer, at the end of the 18th and the beginning of 

 the 19th century. The history of the controversy will be 

 found in J. Needham's History of Embryology and A. W. 

 144 



