870 



DR. F. E. BEDDARD ON 



them occur numerous nuclei sometimes clofe together and some- 

 times more sparsely arranged. These nuclei are more numerous 

 in the larger egg-holding spheres, and would thus seem to have 

 multiplied during a growth. But it must be admitted that the 

 existence of sacs with the lining apparently epithelial is highly 

 suggestive of a state of affairs like that shown by Dipylidium 

 caninum. 



Text-fi^. 146. 



'•. 



A horizontal section through mature proglottid of JEnffonodtsum cedicnemi. 



A. Advanced embryo in egg-holding cavity. B. Less advanced embryo in smaller 

 cavity, v. Ventral water-vascular vessel giving off transverse vessel. 



In this worm, as is well known*, the uterus finally breaks up 

 into numerous quite separate cavities, in which lie many ripe 

 ova, and which are lined by a continuous epithelium. The 

 arguments against this supposition, however, outweigh those in 



* Cy. e.g. Beddard, P. Z. S. 1913, p. 555 text-fig 



