: --- 



HI MAN \N 



appears upon the v 

 ol the latter, an e< 



...i within 



710. 



- 



- 



ol tffx* action ol rly human embn-o 

 aim ol e*Ml ((ands within gfMMl i 



v ead 



- 

 ued prolforu 



_ 

 the cells ol which the 



.. - - .- : \ - 

 v 



the Mulleria 

 This tube comnu 



;he 



- 



- trumpet-shaped 



extends parallel v. 



-, v -,'.a:iv: :o 



r~*, later, bt. 

 reaches the urogeni- 



tul sinus. 



a f- 



:'.- , -- .::.:: 



metrtsol the two Wolffian and the 

 mesoblastic band, the genital cord, that reprints Aj f"^^ 1; 

 tal ridges oi the two sides. Within the &*** od the Mifenaafect 

 nuddlT closely applied to each other, with one WoBfem duct on each ack 



The dei'ltotmtnt of the se.r*at gb*k begbs about the time that tte ttifenm 

 ducts are for i linear thickening of the mnaUfcrfciM and mide 



blastic str however, on the median sur&ceoi the \\oJman body 



1716). Over thi- : rminal ridge, the character of the prirr. 



toneum changes, oUer and undergoing prolferation. 



aroong the increasing eleni. ir specialized ceBs iisriugMished by their 1 



clear protopLism. ami conspicuous nucleus. These are the^rjjwarr germ-i. 

 which later ! e primordial ova or sperm-cells, accoKfcr-. ::me 



in this ottffigrgaf J^pr of the sesnal&am^ 

 ->ed surncieudy to make diferentolioa posriHe. 

 -o! 



both M \ FHk 1717. 







Primary gm> 



ponents. In view ***" 



-'-'.'' 



^iiin Ml1n it is ^ 



probable th;it the Cpn ""*"25j 



chromosomes have much to do with the 



! 



Verentiation of the Male Type. The 

 UMufirrent sexual gland tnrhytg the invasion of t 





