F. J. Meggitt 
the ovary taking its place. The ovary itself is a strongly lobed organ 
consisting of a number of short thick lobes radiating from the segment 
of a sphere, the lobes being 0-08 mm. long, and the concave base from 
which they extend 0-24 mm. in diameter. It lies on the ventral surface 
of the proglottis at approximately the anterior third of its length. 
The dorsal portion of the oviduct (d.ovd.) runs at first anteriorly, 
but quickly bends posteriorly and turns with successive sudden curves 
first laterally, then dorsally, and finally dorso-laterally, running towards 
the interior of the proglottis. During this part of its course it diminishes 
greatly in size, being only 0-0085 mm. in diameter, and has its lumen 
nearly obliterated. After a short course it receives the yolk-duct, 
0-0095 mm. in diameter. The yolk-gland (y.g.) to which the duct leads 
is a slightly lobed organ, 0-113 mm. wide by 0-066 mm. long, formed by 
the agglomeration of a number of follicles round a cavity. Each follicle 
consists of a matrix of cells having very pronounced nuclei and, in the 
majority of cases, their cell limits obliterated. The cavity they surround 
is eccentric in position, being slightly nearer the side on which the 
vitelline duct opens: it is lined by a definite membrane which is, 
however, liable to be absent from it in parts. The yolk-gland itseli lies 
slightly posterior to the receptaculum seminis, but in the same horizontal 
plane, about one-quarter of the distance between the two lateral 
margins. 
After its junction with the vitelline duct, the oviduct passes into the 
ootype, a small spherical dilation, 0-0167 mm. long by 0-0117 mm. wide, 
surrounded by the shell-gland. The latter is comparatively large, and 
is composed of long club-shaped or cylindrical cells with intensely 
staining nuclei. These cluster round the ootype, radiating out from it 
in all directions. From this point onwards, the lumen of the oviduct 
decreases and its wall thickens. It continues to run interodorsally for 
a short distance, but after a quick turn and a short course laterally, it 
bends abruptly upon itself to run anterior to the ootype nearly to the 
anterior margin of the proglottis, about one-third of the distance 
between the two lateral margins. Here it opens into the uterus (ut.). 
The uterine walls are much folded, forming many pockets, and have 
many outgrowths. They are thickly nucleated and are surrounded by 
glandular cells similar to those found along the course of the vagina. 
This glandular part is rather small and opens at its extreme anterior 
end into a narrow thin-walled passage, the uterus proper. In segments 
in which the genital organs are functional, it is only thus represented: 
in older segments it may be seen however that, while the glandular 
