MURDOCH: ANATOMY OF PARYPHANTA URNULA. 273 
that the contracted middle portion of the spermatheca is twisted in 
some examples and not in others, also the length of the vagina is 
slightly variable, and in some cases shorter than it appears in my fig. 6. 
Of the three specimens from Taranaki, two are similar to those above 
mentioned, while the third more nearly resembles the form described 
by Collinge. The penis is a long narrow tube almost uniform in size, 
similarly folded upon itself, and forming a small tightly coiled loop at 
the point where the distal portion becomes free. It has not so great 
a length as indicated in Collinge’s fig. 14, and has no terminal 
sac-like enlargement. In other respects the anatomy does not appear 
to differ in the slightest degree from the several other specimens 
examined. The whole of the specimens which have come under my 
notice are undoubtedly Rhytida Greenwoodi, and there seems but 
little doubt that those investigated by Collinge belong to the same 
species. 
VOL. V.—APRIL, 1908. 19 
