76 ILLINOIS BIOLOGICAL MONOGRAPHS [76 



"Kraemer's description is widely different. His drawing shows a tube with 

 hooks, representing the cirrus, and followed by a proglottis-like arrangement, and 

 then several coils of the vas deferens within the pouch. The drawing has an unreal 

 appearance on the first glance. The cirrus, with its curved hooks, is imbedded in 

 the tissue, which must be torn through before it could be protruded. The proglot- 

 tis-like appearance of a portion of the cirrus, as he drew it, was undoubtedly due 

 to the way in which the circular muscles were cut in sectioning. He drew the 

 cavity of the cirrus, into which the cut ends of the circular muscles projected, as 

 the external outline of the cirrus. The coils would be necessary, according to his 

 theory, but are not to be found. He says that the muscles, which he calls "the 

 roots," are for retracting the pouch, which is sometimes thrust outwards for some 

 distance through the opening. This protrusion is really due to an evagination of 

 the free distal end of the inner tube." 



The female organs in arrangement are typical of the genus. The 

 vagina opens always anterior to cirrus-pouch. Near its opening at a 

 distance of 0.041 mm. according to Kraemer, it possesses a weak sphinc- 

 ter muscle 0.026 mm. long by 0.034 mm. broad over all. In its course to 

 the interovarial space it crosses the bulbous end of the cirrus-pouch or 

 extends beyond the end of the pouch before bending posteriad. The 

 writer has not noted in toto preparations the dilation in the middle por- 

 tion of the vagina as described by Kraemer. There are no coils of the 

 vagina anterior to the ovary. The ovary is bilobed, the lobes connected 

 by a slender mid-piece. The lobes are solid, fairly thick bodies of elon- 

 gated ovoidal shape. In mature proglottids the span of the ovary is 

 about 0.350 mm. In ripe proglottids the ovary instead of becoming more 

 elongated and flattened against the posterior wall of the segment shrinks 

 in size and the two lobes become quite closely pressed together in a small 

 triangular space (Fig. 56) bounded by the posterior proglottid margin 

 and by the walls of the uterine pouches. This triangular space formed 

 by uterine pouches in the posterior end of the proglottid is a very char- 

 acteristic feature in this species. The vitellaria are sparse follicular 

 glands in the lateral margins of the proglottid. 



The organs of the interovarial space are probably about as Benedict 

 has described them for his species and not entirely as Kraemer has 

 described them. The writer has not made sections of this form and has 

 been unable to trace the connections of the ducts. Kraemer established 

 the presence of an ootype, an oocapt, and a shellgland. The paired 

 vitelline ducts do not originate as far anterior as Kraemer has figured 

 them. They probably unite to form a single vitelline duct as in other 

 Proteocephalid species where this has been investigated. Kraemer noted 

 in toto preparations that the vagina anterior to the ovary was appar- 

 ently divided, one branch going to the ovary. The second tube is prob- 

 ably the uterine passage which can frequently be seen in toto prepara- 



