The Cevclopr-ent of the *■^productive Canals 
X 
in the F oe-n^rtin with corsporiooc of iho Scroll• 
i-ofi iti n of Fre e-oar tin 
Older Views of its Mature 
’lature of the abnormality 
Lillie's ihoory of the Preo-mrtin ami evidence for It 
Previous fork on Jro, enitul Sy»te of Cattle Embryos 
Purpose of this Study and its lap: rt nee to the larger 
Problem of Sex-differentiation 
Central Conclusions from t is Study 
ii-iTdilAL iCii> l&Tl'iW'S 
Source of Material 
Treataeot of Material 
Moa; uresonto of dsbryos 
Reconstruction Drawings• flow judo 
Tabie of AriBuls Figured <*nd Stuaied for this Paper 
Table 2• 
■iOnadc of Feesale, rule a d Tunica a.bug! ea. 
Secondary sex-cords, etc* 
in fesoie, ’ale a d Froo-nciHLin 
^lioriaa Uicta ana ..erivativos; tubes, uterus and 
Vagina 
Vac ua vs iMslis, Hound tiganont, a i uteer aculur. 
t’ate o-" the deao sphroa 
