658 MR. F. E. BEDDARD ON 



In sections through the posterior segment of the body, the ripe 

 eggs, with their sacs, are seen to occupy the whole of the available 

 space, that being, of course, the medullary region of the proglottid. 

 The segments are, in fact, stufted full of eggs, and, in accordance 

 with this, their dorso-venti'al diameter has somewhat inci'eased, 

 though not to so very great an extent as in some other Tapeworms, 

 for instance, in certain specimens of the Oochoristica desciibed in 

 the present paper. A closer examination of the eggs shows that 

 they are imbedded a few together in a dense and darkly staining 



Text-%. 158. 



Transverse section through proglottid of Thysa)iosoma gamhianum to show 

 numerous paruterine organs (e). t. Water-vessels. 



mass of tissue, which closely invests them. These sacs appear to 

 me to be, without doubt, the equivalents of the paruterine organs 

 of many Cestoidea. They are not precisely sacs, in that there is 

 no central lumen occupied by the eggs ; they are rather concen- 

 trations of the medullary tissue i-ound a series of eggs. These 

 bodies are of approximately equal size and contain much the same 

 number of eggs or, rather, embryos. There is no question here 

 of a circle of paruterine organs surrounding a centrally placed 



