REPRODUCTIVE HISTORY OF THE MOLE, 201 
suppose, that a vagina closed by a thickened hymen is present ; 
for in the female as in the male, the perineal skin passes without 
interruption from the base of the genital tubercle to the margin 
of the anus. Such a description holds good, I think, for all first 
year females during the autumn and winter months; but in the 
early spring external changes are apparent. In the second week 
-Text-figure 5. 
External genitalia of a normal male. 
of March in moles caught in Epsom, and during the third week 
in moles caught in the neighbourhood of East Grinstead, the 
perineum had become pigmented. This pigmentation, so far as 
my observations go, occurs at first in the absence of any anatomical 
change in the perineum. 
