360 



EMBRYOLOGY. 



duct immediately behind the pronophric tubules. The duct con- 

 sequently serves from this time fonvard as an outlet for the newly 

 formed glandular organ also, and can therefore be designated as 

 mesonephric or Wolffian duct. 



When it is stated that a gland is developed on the mesonephric 



35 



CJ -*3 0" 



r O 



in 



01 ci 



enephr 

 dorsal is 



'& 2 



"S a "" 



o o> ^J 



fO ^ Q 



*; | ts 



r-j "S 



S 



n 





o 



n 



a 



a 

 '& 



. 



a - 

 53 c 



r- .0 



S r 5b 



2 I 

 II 



It 



o r 

 c ^^ 



5J 'S -^ 



i 



pa 



o ^ 



CO P=H 



- V' 

 ^^ 



- g 



o si & 'rf ^ ^ 



K hn 5 Q 



C 



01 



fl -^ 



rH 5^ 



o o 



C3 



OT 

 )_^ 



n S3 

 w O) 



QJ *-H 



^ s 



O TO 



.S bo 



- ^ s a 



r= a a .2 





. 



s" 8 S 



* 

 a 



G o 



a .- . 



duct, one at first thinks that lateral buds grow out from its wall and 

 give forth branches, as occurs in the fundaments of glands formed 

 from the outer or the inner germ-layers. Nothing of the kind takes 

 place here. All observers with the exception of a few earlier 

 investigators agree rather that the glandular tubules of the meso- 

 nephros arise independently of the mesonephric duct. The source 



