182 WHEELER. [Viornss 
8. Female Reproductive Organs. 
The ovaries are a pair of round translucent bodies, one on 
either side of the anterior gut-ramus, between its first and 
second, or second and third diverticula (Fig. 40v). They 
appear to be simple sacs consisting of small, flattened cells 
enveloping the maturescent ova. I can detect nothing which 
may be regarded as a parovarium in Syuce@lidium. 
The oviducts (Fig. 4 0vd) leave the posterior outer surfaces 
of the ovaries as thin tubes. At first they run a little within 
and then along the dorsal surface of the longitudinal nerve 
trunks (Fig. 100vd) till they reach a point in front of the 
confluence of the posterior gut-rami. Here they converge and 
unite in the median line to form a very short vagina, which 
opens on the posterior wall of the genital atrium (Fig. 4 vg). 
The vagina is supplied with a number of slime-glands (gg7), 
which are undoubtedly homologous with the glands figured in 
a similar situation by Iijima for Planaria polychroa (84, Fig. 5, 
Pl. XXI dr), and Dendrocelum lacteum (Fig. 1, Pl. XXIedr), 
and by Lang for Gunda segmentata ('81», Fig. 56, Pl. XIV). 
The vitellaria are granular cell-cords which in the sexually 
mature Syxcelidium fill all the available interstices between the 
gut diverticula medially to the testicular sacs. Their general 
arrangement may be gleaned from Fig. 4 v¢; their cytological 
structure from Fig. 10 vt. In sections the cell-cords are found 
attached to the walls of the oviducts, but on the method of 
their opening into the latter I have made no observations. 
In his account of the anatomy of B. candida (79) v. Grafé 
makes the following statement: “ Auffallend erscheint dagegen 
die Duplicitat des Uterus, der jederseits zwischen 7. und 8. 
Darmmast (von hinten gezahlt), durch je eine besondere Miind- 
ung rechts und links vom hinteren Ende des Schlundrohres 
sich nach aussen 6ffnet.’’ Before I had seen th:s statement I was 
surprised to find two uteri in Syucelidium (Fig. 47). They 
are spheroidal bodies conspicuous in the living animal as trans- 
lucent foam-like masses on either side of the genital atrium 
and forming apparent interruptions in the posterior gut- 
