mesonephroi retained than ia eit&er male or female* but tfe:> relative 
ptiilti<:*n vtsa c'nna ti -?ne of parts retained are with slight modi¬ 
fication. 
In the SO.C c*. fr*e- artln (Kit;* *’41 th ret© rotai * it* con- 
noction to the anterior tubule reruns in the ori -idycio. but boo lo©t 
it with th hydatid -hich is also absent* * dtsetoa oborrat!* 1# r*pre- 
3 enteu by a aigle isolated tubule, ext-rndirg for - ara fr •:.-•■ th'? nsepne- 
pbros in the body wall, ©operate from tfc* ether tubal*** Jlomeruli are 
•beent, %ilc th© cranial group of tubules is not yet $uite ar» -ueh 
stimulated *p in th© male* wticro they for* the dootuli efferent** of 
the epididymis* there is nor© aesorjepiiros as a whole then in the male 
or female, 
the degeneration of the aea< sepfcres in the fn*e~steriin Ac clower 
than in either sea normal* but in general* it follows the ale uethod 
of disappearance* in that the cranial group of tubule# form ducts 11 
effer ante© of th© opididycia. 
The grogenltal Tinuc and It Derivative© » 
An before described* th* separation of th- urogenital witaua 
frorj the roc tun is complete by th f,4 or, sta a. In the female the 
peri nets- remains short* and the urogeritf'l sinus o ©ia to the exterior 
through the urogenital plate at thtc early stage* while in the wale 
the elms remains clos >d. ar*© a ridge cr raphe ferae vortrally over 
iha uro ianital einurt, which in prolon ed to the tip of the fiallue by 
a narrow vertical plate of ceils derived frer the urogenital plate, 
the per.ia r.igrates root rally a Ion? the belly wall to it© definitive 
position close to the umbilicus, This greatly olo-gates th* urethra 
In the mils* particularly in the fmm -ereranaooa and pare cavernosa* 
and directs It antoro-vertrally, instead of posteriorly as i;s the fe~ 
sale. 
