NEW TAPEWORMS PROM THE HTRAX. 597 



great interest to enquire if this network is directly connected with 

 the network of vasa efferentia. But I have at present no further 

 facts to offer. 



The ovary Of this tapeworm is unquestionably single. It lies 

 on the pore side of each proglottid in the neighbourhood of the two 

 longitudinal water vessels of that side. The ovary is apparently 

 sometimes quite anterior to the testes, and sometimes is sur- 

 rounded laterally by them. The vitelline gland is posterior to the 

 ovary, which is thus the most anterior of the generative organs. 



Text-fig. 81. 



d.v. 



V.J/ 



U 



1- - ■ ■ ; \ X 



sp.d. r-s. v.g. 



Text-fig. 81. — Part of a transver-se section through a proglottid of Syracotania 



Tiyracis, to illustrate the .immature ovary. 



d.v. Dorsal excretory tube. o. Ovary, v.v. Ventral excretory tube. 



Text-fig. 82. — Transverse section of one-half of a proglottid of the same species. 



d.v. Dorsal excretory tube. o. Part of ovary, r.s. Receptaculum seminis. 

 sp.d. Sperm-duct. t. Testes, v.g. Vitelline gland, v.v. Ventral excretory tube. 



Its exact position with reference to the two water vascular vessels 

 is not always identical. It is more dorsal or more ventral, as the 

 case may be, and is sometimes entirely to the pore side of the 

 ventral tube of the excretor}'^ system, and sometimes entirely to 

 the median side of that tube ; sometimes it extends to both sides. 

 In any ease it lies more or less between the dorsal and ventral 

 excretory tubes. The ovary is not solid and compact, but arranged 

 in a series of finger-like outgrowths radiating outwards and 



