266 DR. FE. E. BEDDARD ON 
testes, which lies behind it. The vitelline gland is not in contact 
with hs ovary, and between them lies the shell-gland. Ina 
complete series of horizontal sections, it can be obser ell that the 
vitelline gland extends further ventrally than any of the gonads 
and that it nearly reaches the dorsal limits of the medulla. The 
duct of this gland is comparatively wide where it leaves it 
anteriorly, but soon narrows. The vitelline gland is later in its 
growth than the ovary, for, in earlier proglottids than such as are 
veferred to in the above deser iption, the vitelline gland is pro- 
portionately considerably smaller than the ovary. 
The ovary is single and as nearly as possible in the middle of 
the body. Ibis, as is so usual, mainly developed laterally in two 
wings. The ovary lies in front of the vitelline gland and of the 
neeteee it is very near to the anterior border of the proglottid. 
The ovary, as is usual, is not solid and compact, but frayed cut 
laterally in a digitiform fashion. The ovary extends laterally 
beyond the vitelline glands, but not so far as do the testes. 
The female efferent apparatus is simpler than in many tape- 
worms. It opens into the genital cloaca by an expanded funnel- 
shaped mouth lying behind the entry of the cirrus-sac. The 
vagina runs a straight course to about the middle of the proglottid, 
where it bends posteriorly and becomes coiled before opening into 
the shell-gland. There is no dilatation along its course—nothing 
that can be described as a receptaculum seminis. Even in quite 
ripe proglottids there is no change in the female duct, except a 
slight diminution of the always narrow lumen. 
§ Uterus and Embryos. 
In this species, as in others referred to the genera Linstowia 
and Oochoristica, a uterus exists for a space; but later the 
embryos come to be implanted singly in the parenchyma of the 
body. 
One remarkable feature of the uterus in this species is its 
sudden appearance. In one proglottid there is no trace that I 
could discover of a uterus. In the immediately following pro- 
glottid the uterus was present in a well-developed condition. Its 
general appearance under a low power is shown in text-fig. 2 
The ripe ova (ova at this stage, not embryos) are found over a 
large area of the proglottid, but limited to the medullary region ; 
indeed, they do not extend outside of the lateral trunks ofthe 
water-vascular system. These scattered ova are found in front 
of the ovary as well as behind it; they also occur among the 
testes, where the latter begin to thin out ventrally. They are 
thus mainly ventral in position, the testes being mainly dorsal. 
Although the cavities lodging the ova have, so far, been spoken 
of inferentially as a uterus, there is no continuous uterus in this 
worm with its own definite walls. On a rapid gion at such a 
section as that which is represented in text-fig. 2, the impression 
given may be that the ova ave contained in a series of circular or 
