NEW TAPEWORMS FROM THE HYRAX. 



601 



many .other — indeed the majority of — Tetracotylea, but is at most 

 once or twice bent upon itself. It becomes very narrow for a 



Text-%. 83. 



v.v. 



:i 



\' 



»■ "% 



k' 







r.d. 



.f 



tr. 



Portion of meduUaij' region of a proglottid of Hyracotcenia liyracis, to illustrate 

 network formed by vasa efferentia (v.d.). 



T. Testis, tr. Transverse muscular layer, v.v. Ventral excretory tube. 



Peoc. Zool. Soc— 1912, No. XL. 40 



