4 . 
cer&aefeick: r (*1 ) ».ork@d out th© development of ti» foaalo 
Wolffian astc Ufillerian aucts yusa > ©nitfcl ppurutus i:. cattle and 
do cribo the changes found in tne norxsal feasaie. biilia {’17, 
) took up too protti an to-'leal odi loot! n« of toe fro©- 
sartio te compared : tr. »c;n© sales and fossalec on a baaii for hie 
theory of tie free- • .rtis# and a riesut ittt y O’* a .75 05 • iYee- 
•i-ortin a* n»i ^ stoma:. fhitalia. fh^.-in *17) inci- ton i her 
pi^r o- tho footal frie-eartin * onad sa..^ notes on tr.e ducts 
adjacent to the ^onad• Ail oar . ier cttiuies otn-iot for tr© coat 
part of Ari^to^ieai description* o individual free-martini' without 
. an., attarpt to correlate t^a situation with -orr,gi odes of 
development. 
-rcas d nsection cannot show the real state cf tho duets and 
their derivatives and definite knowled e of these c -rd lions at 
o ccsssiro nta, os in both normals* and frec-oartia## a d a com¬ 
parison of one vita a other at equivalent stages. in necessary os 
the m:sic for dc sire conclusion© on to tn© course and caucus 
cf trio dificatioiu 
At the suggestion cf Professor r* h. Lilli©. the writer 
started to investigate the norm . velcp-ont of the cex-dmots 
and ;-,er:itai canals ip sale o*:-d fere © c#lf-ombryoa # up to a eta ; o 
when tho or,.-os or© well started t war:: their efinitive co- - 
dition. r or top rgoso of csr arin* the odes of development in 
the two coxes. At t e collection of n t rial for the study out- 
Un-d at eve went on. free- rtin w r© taken which fitted into the 
V 
incorporate, into the study. In one can , the cor pari son cf two 
ad to uste » and cor¬ 
relate t;,o variation fouid in t,.o ;© of* tac eaoo else* 
