202 DR. F. WOOD-JONES ON THE 
The genital tubercle becomes more vascular, and, in the recently 
dead specimen, is intensely injected and vivid red; the anus 
shares to a lesser degree in this change, and although the vivid 
redness may be in part a mere post-mortem phenomenon there can 
be no doubt as to the increased vascularity of the parts. This 
phase of pigmentation is shown in text-fig. 6. In well-marked 
Text-figure 6. 
External genitalia of a young female taken in March. 
Stage at which pigmentation is present. 
contrast to this redness of the genital tubercle, the perineum 
shows a bluish coloration which is reminiscent of the sexual 
perineal pigmentation displayed in some Primates. This blue 
pigmentation is certainly not a post-mortem change, and indeed 
there are some indications that it tends to fade after death. 
Later in March this pigmentation becomes more vivid; the 
whole perineal structures are enlarged and highly vascular, and 
