t582 DR. F. E. BEDDARD ON 



described above in the scolex, which was examined entire and by 

 the aid of a lens only. These two suckers were not exactly 

 opposite on the opposite sides of the groove. They represent 

 all that I can find in the scolex comparable to a rostellnm. I 

 believe, however, that they do not represent the rostellnm of the 

 Tetracotylen . 



Text-fig. 96. 



H. 



A 



B 



H. 



/ 



\. 





Two consecutive sections through one of two larger suckers bearing hooks. 

 A. Muscular laj'er of sucker. B. Cellular layer in which lie hooks (S.). 



In these sections (text-fig. 96) the sucker appears cup-shaped, 

 the orifice naturally opening into the median transverse groove 



