274 DR. F. E. BEDDARD ON 
under only moderately high powers; and when gorged with 
sperm they are not any more conspicuous. 
§ Female Gonads and Ducts. 
The ovary lies anteriorly in the proglottid, but is prevented 
from reaching the actual limit of the proglottid by the transverse 
uterus which lies in front of it. It consists of a central portion, 
which lies practically in the middle of the proglottid, and of 
two lateral wings. ‘The latter are frayed out into numerous 
thick digitiform processes, which extend rather beyond the 
range of the posteriorly situated vitelline gland. In sections cut 
horizontally the digitiform outgrowths of the ovary have the 
appearance of circular or oval sacs filled with ova. They present 
the very closest resemblance to the sacs of the uterus which le 
among them. The vitelline gland is rather smaller than the 
ovary, behind which it lies. It is very much of the same form, 
being prolonged laterally into blunt processes. The vagina runs 
at first a straight or slightly sinuous course behind the vas 
deferens; it then bends backwards and becomes dilated to form 
a cylindrical receptaculuim seminis, which lies obliquely at an 
angle of about 45° with the longitudinal axis of the worm. The 
lumen of that part of the vagina which is nearest to the 
receptaculum is narrower than that of the outer section of the 
vagina; I have observed cilia lining the vagina at a considerable 
distance from the external orifice. The receptaculum seminis 18 
generally full of sperm. In many cases I have found numerous 
ova within it. I have not observed autocopulation in this 
species. 
§ The Uterus and the embedding of Ova in the Parenchyma. 
In the genus Oochoristica the uterus 1s not a prominent feature— 
“Die rasche Entwicklung und der ebenso prompte Zerfall des 
urspriinglich ventral angelegten Uterus characterisiert, soweil 
genauere Untersuchungen ein Urteil erlauben, das ganze 
Genus Oochoristica,’ writes Zschokke * in a general survey of 
the characters of this genus. No precise figures are given‘as 
to the duration of the uterus by Zschokke in the species 
(O. rostellata) described in the memoir from which the above 
quotation has been made. I find myself that, in the species which 
I deseribe in the present paper, the uterus 1s quite obvious in 
34 segments, a space of about 10 mm. in length, which is a very 
appreciable portion of the entire body-length. 
The uterus is seen on a general examination to consist of 
numerous closely adpressed circular to oval chambers, which are 
more or less filled with eggs. This system of cavities is at first 
mainly ventral in position. In a series of horizontal sections 
the ventralmost show only uterine cavities, which extend up to 
* Zeitschr. wiss. Zool. Ixxxiii. 1905, p. 63. 
