14 
Filaria loa 
The vagiua curves backward a short distance (0'2 mm.), then 
suddenly inwards and is lost to view on account of the opacity of 
the worm. Just before we come to the curve in the posterior ex¬ 
tremity the posterior oviduct bends upon itself and we can discern 
numerous large ova. The intestine follows the greater curvature until 
about opposite the anus when it can be seen distinctly crossing from 
the dorsal wall to the auus. 
The second female examined is 55 mm. long and 0 5 mm. wide, and 
presents these differences: 0'49 mm. from the anterior tip we come to 
the loop of the anterior oviduct that completely crosses itself anteriorly 
to the vulva which is 1'75 mm. from the tip of the head. The vagina 
runs pai'allel to the wall directly from the vulva backwards a distance 
of 5’6 mm. where it becomes a bifid uterus. It presents thick walls. 
Near the posterior extremity the two loops of the posterior oviduct 
seem to fill the entire body cavity and the ova or embryos are not so 
closely packed. The larger ova measure 0‘015 mm. x 0‘024 mm. and 
appear as coiled embryos. At this same part the intestine is discernible 
as well as two loops of the posterior ovary, which overlie the posterior 
oviduct in braid-like fashion. In this female the posterior oviduct 
passes back into the very extremity of the tip where larger ova are 
discernible. The anus is 0’210 mm. from the tip of the tail. The 
diameter at the anus is 0182 mm. 
The third female examined had been broken off about 20 mm. from 
the head. This specimen was white and did not become clear when 
treated with the alcohol-glycei’ine. It had been placed in ordinary 
tap-water and was not preserved, nor were the embryos examined 
until 48 hours later. The embryos were motionless and probably 
dead. 
In so far as it could be examined it was like the second female. 
It was from this worm that the free embryos were obtained. They 
occurred in great numbers. Only two were measured. One is 0‘279 mm. 
long, including the sheath projecting from the head end. The sheath 
projects beyond the head 0'009 mm. The greatest diameter is 
0'006 mm. The other is 0'294 mm. long x 0’006 mm. broad. In 
both the sheath projects beyond the point of the tapering tail 
0'015 mm. The anterior end is bluntly rounded while the tail is 
finely drawn out. The cuticle is smooth and the interior of the 
body appears to be finely granular. We were unable to observe the 
V spot. 
