442 DR. F. E. BEDDARD ON 



I may point out, in conclusion, that the subfamilies Idiogeninse 

 and Davaineinfe, have con-esponding relations to Cestodes 

 commonly referred to different families by reason of their lack 



Text-figure 6. 



, \ 'I A* ^«6r— - ^ 





at: 



t. 



Horizontal section through immature proglottids, showing position 

 of gonads. 



c. and t. Cirrus-sac. l.v. Lateral water-vascular tube. o. Ovary. Ut. Testes more 

 thickly disposed on the side away from the pore. T.B. Transverse wat^r- 

 vessel. v.ff. Vitelline gland. 



of rostellar hooks. There is, fcr instance, a close resemblance 

 between Rhahdometra and its allies and Idiogenes, which possesses a 

 single paruterine organ, on the one hand, and between Zschokkeella 



