864 



DR. F. E. BEDDARD ON 



than the innermost, which I take to he the dorsal vesseh The 

 tubes run nearly parallel to each other ; but the dorsal vessel is 

 slightly to the dorsal side of the proglottid. The ventral vessels 

 are connected in each proglottid by a transverse vessel which is 

 shown (in part) in text-fig. 143. 



Text-fig. 142. 



m. 



Part of a transverse section through a proglottid of EugonodcBum cedicnemi, to show 

 the arrangement of the water-vascular tubes and of the longitudinal muscles. 



d. Dorsal vessel, m. Longitudinal muscles, n. Nerve-cord. v. Ventral vessel. 



The ovary of this tapeworm is single and not divisible into two 

 lobes, as is so often the case. It lies distinctly to the pore side of 

 each proglottid median of the large (ventral) water-vascular tube 

 and partly ventral, as well as extending to both sides of the 

 doi\sal water-vascular tube. It lies in each case a,nteriorly in the 

 proglottid, and not very far behind the transverse water- vessel 

 of the proglottid in front. In front of the ovary, however, lie 

 some of the coils of the sperm-duct ; it is not, therefore, quite at 

 the anterior margin of the segment. The vitelline gland lies 

 behind the ovaiy and towards its inner (median) side. The 

 relationship is shown in the accompanying drawing (text-fig. 143). 



