54 , 
to the voetiend at the 15,0 or, sta:,o tl*• vagina opens straight 
anteriorly fr » the dorsal corridor of «h© vestibule as in later 
stages, 
.,o«c&lied hoaclcguoa of the prostates, the p;*r*~ur«tfer*l ducts 
d. «Ot Mil their uppear&ooa tosffcr. ea. stag* (Fig. 11), *fctn 
ti^oy appear ac two t r throe snail aide duo to off the dorsolateral grooves 
of the rest-hole# a «;hcri dietarnse posterior to the vagina orifice, 
they do not develop in the poet.'ro-a»ter ior direction oh rnoterieiic of 
tbs mis and thv-y are such belated in appearance. 
Anterior to the v&gino-vestibular opening, the urethra proper 
•steads forward to th$ ureter openings. As described before, this 
distance length esc rapidly In fee fezsaie to heoosje double that in the 
ealo by the 3,0 ee, stage, (Fig. S) an,: still longer relatively, later. 
At 5. on, it p&ssee forward without narrow.ag noticeably, chan, as 
froe a square cross-caution outline to a crescentic one, and develops 
& ridgo in its dora.il wall, through which the ureters suiter it. Ja 
later stage©, whoa the suburethral divert!cuius develops fr-» S.O ©». 
upwards (Fig. 8), it hfia a sudden decrease in ltmen, Just in front of 
the vagina opening, with the auburethr*! divertic Ins developing ac a 
forward projecting hilad poach, ventral to its narrow posterior end. 
This divert 'oultta i nor eases in ais.«, and finally, by the 15.0 os. 
stage (Fig. 9), it feraa *m anterior continuation of the venire: corri¬ 
dor of the vestibule, with tfe? very narrow typically female urethra, 
opeaing into its d roal vail near its interior end. This diverticulum 
enlarges and lengthens up to the £0.0 ea. stage (Fig. 11). This saasa 
to have no hoscloguo in the sale. 
In ’aaloor- 
The uroge ital plat© doe. not beco&o perforated as in the fesale, 
* * 
sad, at £.8 ca. (Fig. IS), its edges in the m ddl* and dorsal part have 
begun to grow together to fora a raphe ventmlljr froa the pari us. 
