mi: ORG UN Of TIM: MIM>I.I: G 



:died the i !' tin- te.sti-, iii human m 



:i t lie act ivi-ly ]>n. Iii. .uinal 



epithelium numerous cords, in which lar_re primitive seminal cell 



Tlit- curds afterwards hee. ..... I lie -minal tuhule-. In .Man then- prevail- 



the l)"L r iiniinu r . remarks. such a irrcat dilfeivi n tin- t\\.> 



. both iti tli" 1'i.riii <>f tin- c.n<_rinal ireriuinal rH-jv and in the \vhulo pn 

 of its differentiation. that one can r800gniS6 in the anal unieal .structure of the 

 sexual glands from a \ery early sta^e whether 01.. fte him a 



male, 



/' tin' l>itj'i r<n1 l-'n n'ln in- ,'it'i' 



>//.s7/// into tin' A'fi'lf Condit 

 \v.> have beoom :tc.|H.-iini.-(l in the pivcedin-- pagee with the first 



development t' the \-ai-i. >us jiarts wliieli cdiisiitute the t'oundat idi- i.f 

 the iiro^eiiital syMein. 'I'li'-s;- are (liir. -I 1 .') three pairs ..f canals 



the inesonephrif ducts (////). the Miillerian ducts (UK/}, an 1 the 

 ureters (///) and in addition a i^reat nuiiihei 1 ol' glandular st met ui-e> 



l>rone|>hr<>s, nu-soiu-phi-ns (-'//). met an.-phi-o- ( // ). and tlie sexual 

 glands (/,</}. o\ai-y and test is. 



It Avill l>e my task in what follows to indicate how the ultimate 

 condition is derived t'r.m these einl.ryoi'ic I'undainent s. hi thi> I 

 shall limit myself, in the main, to Man. herause we now have to do 

 with more ea.-ily im e 'ti^a t ed. and in general well known condit i..n>. 



In a human einhryo eii:ht weeks old (ijir. -J-Jll) the fund:imnt-. 

 if we neglect <lill'erences which are ivc. j;n>al>le only hy the ail 

 of tlie microscope, are so -imilar in male and female as to U> 

 indistinguishable. 



All the glands lie at the .-ides of the luiiiiur vertelna'.' fartjust 



forward the kidney (//). which is a small bi-an-sluipi-il ho-lv ; upon 



tliis lie- the Miprarenal hody (/<//). that at this time is dispropor- 



tionately hirire and is to le seen only on the left half of the figure. 



newliat luti ral to 1 1n- kidney one 86 > the primitive kidn v ( n i 



as ;.n elnlipUed, li:i 1 row t ract of tissue. It i.s attached to the Wall 



of the trunk hy a connect ive-tisMu- lamella, a told ,.f the peritoneum. 

 the >o-calhd mes-m cry of the primitive kidney. In the middle.}' 

 the jiland it is rather hro:id, hut ahnve. toward the diaphragm, it 

 is elongated into a nari->\v hand, which KIM.UKKK \\:^ ile>erihed as 



the diaphrttgmatic ligament ot th- primiti\e kidne\. 1'pon careful 

 examination one also oh>, rves at the lower end of the primitive 

 kidnex a -ec-md fold of the peritoneum, which runs I r.,m it to the 

 inguinal region t lip.. L'l!* and I'-jn ,//,). It encl-se.x a linn strand 

 of connective tissue, a kind of lipniM-nt. that i.sdt.stined to plax a 



25 



