REPRODUCTIVE HISTORY OF THE MOLE, 205: 
genital ducts becomes entirely closed again within a very short 
space of time. 
Some specimens examined in the autumn months show nothing 
more than a wrinkled surface at the base of the genital tubercle, 
and somewhere in this wrinkled area is commonly a patch, or a 
series of minute patches of dark pigment (text-fig. 8). Others 
show a very definite transverse scar, more or less puckered, 
and generally pigmented in some portion of its length (text- 
fig. 9). At times this scar formation is irregular, and pockets 
will penetrate some distance into the perineal tissues. In one 
instance, a probe could be passed far into the vaginal mouth of 
a November mole, although this vagina did not form an open 
channel communicating with the uterus (text-fig. 10). 
Text-figure 9, 
e 
Winter female with perineal scar (Dec. 5th). Second year. 
It would therefore seem that in virgin moles a vagina is 
formed in the early months of the spring; that after parturition 
has taken place it closes again in whole, or in part, and that by 
the autumn its orifice is represented by a mere perineal scar. 
I do not know how long moles live, nor how many times they 
breed, but it would seem that at every recurrent breeding season 
the process was repeated, and the vaginal orifice re- -established. 
So far as I have been able to determine, the vagina as a patent 
