SANGUINICOLA 237 



Sanguiuicola is hermaphrodite and its reproductive organs 

 have been well described by Dr. Plehn in her first paper,^ 

 but, judging by my specimens of the Sudan Sanguinicola, she 

 has erred in several respects in her second revised description 

 of Sanguinicola as a monozoan Cestode, as I shall indicate 

 later. 



The ovary (ov) in the Sudan Sanguinicola is bipartite in form 

 and is extensive, occupying the margins of nearly the whole 

 of the anterior two-thirds of the body, external to the testes, 

 gut sac, and pharynx (PI. 18, fig. 1). The oviduct (ovd) is 

 median and, according to the convention I have already 

 adopted, dorsal in position, i. e. on the side of the body bearing 

 the longitudinal furrow (PI. 18, fig. 2). Ovarian follicles are to 

 be found anteriorly at the sides of the pharynx (interspersed 

 with the muscle-cells surrounding this organ), and they extend 

 posteriorly, on each side, opening into the median oviduct 

 by some eight or more transverse ducts (hidden under the testes 

 in fig. 1). Posteriorly to the last pair of transverse ducts, the 

 oviduct, in a dorsal view (PI. 18, fig. 1, shows the ventral aspect), 

 turns to the right above the median vas deferens ; then, 

 becoming much dilated, bends again to the left and somewhat 

 posteriorly, passing ventral to the vas deferens, and finally, 

 becoming narrow, runs posteriorly on the left-hand side, to 

 open by a narrow aperture into the distinct spherical fertiliza- 

 tion chamber (otp) on its posterior aspect. From the anterior 

 side of the fertilization chamber and by a similar small opening, 

 arises the vagina (vagn), which is short, narrow at first, and wider 

 after (vagb), and opens on the ventral surface by a circular 

 vaginal pore (vagp), which lies at the end and at the bottom 

 of an elongated ridged muscular oval groove (vagr), directed 

 to the left and posteriorly, the vaginal groove (PI. 18, figs. 1, 7, 

 7y, 7x, 8). The course of the oviduct I have above described 

 is constant in all my specimens. I may also mention that the 

 oviduct, fertilization chamber, and vagina are all distensible 

 structures, but that I have never observed the openings 

 into and from the fertilization chamber to be otherwise 

 than narrow. 



1 Ibid. 



