686 



DR. F, E. BEDDARD ON 



Fuhrmann. Outside of these layers of fibres the cortex presents 

 no features which differentiate it in any marked way from other 

 allied forms. 



Text-fia-. 98. 





^ ,>V^ 



# " i. 





f 



\W 



L.m. 



t.m.. 



Section through the muscnlai- laj'er of the cortex, taken at a point further 

 back than that represeuted in text-fig. 97. 



l.m. Bundles of longitudinal fibres, t.m. Transverse fibres. 



The water vascular system of this tapeworm is in more than 

 one respect remarkable. In transverse sections through the 

 ripe proglottids only two vessels are as a rule visible, one on 

 each side of the body. The most careful examination often 

 failed to reveal the presence of another, even minute, tube. Nor 

 did longitudinal sections show any trace of this second vessel. 

 It is not, however, really absent in this worm, as I found it 

 to be in Thysanotcenia lemuris, for it is present as a very minute 

 tube in some segments. The vessels which are obviously present 



