O. V. Huffman and Wm B. Wherry 
13 
anteriorly to the ano-genital opening at a distance equal to the length 
of the post-anal portion of the tail. This pair is the largest and most 
perfectly pyriform. The pairs are successively smaller and situated 
closer together. Between the two rows of papillae there is a slight 
concavity but the ano-genital opening is at a slight elevation. 
The Females. 
External structure. The first female examined is 50 mm. long and 
0‘5 mm. at its greatest diameter. It is 0'084 mm. across the tip of the 
cephalic cone. The base of the cone is 0'084 mm. from the tip, and at 
this point the diameter is 0T82 mm. 
At a distance of about 0'7 mm. from the anterior end the maximum 
diameter of O'o mm. is reached. This diameter is maintained throughout 
the anterior one-fifth of the entire body length whence it gradually and 
evenly diminishes in circumference back to the rounded tip of the 
posterior extremity, which is partially curved ventrally but not so much 
as the tail of the male. 
The anus is 0’21 mm. from the tip of the posterior extremity on the 
ventral aspect. At the anus the diameter of the body is 0T92 mm. 
The cuticle is of the same thickness as in the male. At 2T mm. 
from the anterior tip is the genital opening, which causes a slight 
protuberance. 
The first boss is 4'2 mm. from the anterior end. From here on the 
bosses occur at irregular intervals and are more numerous than in the 
male. Furthermore, they are found upon the posterior extremity back 
to the very tip. 
In the slightly curved posterior portion the cuticle is striated, but 
not so plainly as in the male. This appearance may be due to a 
crimping of tbe inner softer layer yet it shows most distinctly beyond 
the anus where there is no bending of the tail. 
Internal structure. The cephalic cone is translucent as the heavy 
musculature does not project into it. At its base and along tbe 
oesophagus there are dense granular masses which may be glandular 
or neiwous tissue. These obscure the light to such a degree that we 
cannot disce];n any papillae about the head. 
At 0'35 mm. posteriorly we come to a loop of the anterior oviduct. 
Within the oviduct we can discern numerous ova or embryos. The 
oviduct is 0'07 mm. in diameter and does not cross itself anteriorly 
to the vulva. The oesophagus and intestine are pushed aside. The 
musculature occupies a considerable volume at this point. 
