r 49 
the ventral surface of the body ; there are however very often, in one 
testicle or in both, other branches or, more precisely, bulging* of one 
or two main stems which project towards the ventral surface and 
appear as thick, compact bodies with irregular outlines. They were 
already seen by McConnell, but interpreted as the whole testicles, 
whereas in truth they are only parts of them, and are not even 
constant in their presence. The ovary is usually trilobate, but very 
often shows, in addition to the large lobes, three to six 
smaller ones which are sharply separated from the former. The yolk 
glands vary somewhat in their extent. They normally reach from 
the level of the ovary to the ventral sucker, but it is not at all 
uncommon to see them, on one side or on both, commencing and 
ending somewhat farther forward or somewhat farther backward of 
the usual place. I hey present in Cl. sinensis, a striking peculiars 
inasmuch as almost constantly a certain number of the groups ot 
follicles of which they are composed remain undeveloped ; sometime 
one only on one side, sometimes more, on one side or on both; tlu 
bands represented by the glands as a whole showing thus one or 
several interruptions by empty spaces. In perfectly mature specimens 
the seminal vesicle extends about as far back as the middle of the 
uterus. 1 he remaining organs do not show any peculiarities. 
The average dimensions of the eggs are 0*029 mm. length and 
0*oi6mm. width; the limits of the former being 0*026 and 0*030110, 
and of the latter 0*015 and 0*017 mm.* la many specimens of tlu 
species the eggs show a distinct narrowing towards the anterior 
extremity, and their rather high lid is marked off by a sharply 
projecting brim. I have however also seen specimens in whose ov 
these peculiarities were but little pronounced (see fig. 7). 
An interesting variation chiefly observable among the specimens 
of the Port Said case concerns the colour of the uterus as a whole In 
some individuals, this is only a light yellowish-brown, even in tin* 
most anterior coils of the organ, whereas in other individuals the whole 
lh ere exist, of course, among the immense number of ova in an individual 
. orm always some which are either larger or smaller than the rest, or even 
K 1 ently misshapen. In my opinion it is of no use to carefully record thr 
measurements of these eggs also. For the description and definition of a spe< ;• 
15 much more important to select for measurement those ova which appear to be 
normal and to present the size and shape typical for the species. It may be addrd 
ln P ass tng that young worms with few ova in their uterus usually do not afford 
normally-shaped and normally-sized ova. 
