276 DR. F. E. BEDDARD ON 
to be much as in O. rostellata, though Zschokke does not mention 
the invasion of the cortical layer by uterine spaces. It is to be 
noted, however, that in my species the extension of the embryos 
into the cortical layer mainly takes place laterally, and not 
dorsally or ventrally to any great extent, though here and there 
I have observed embryos in these regions of the cortical layer. 
Text-figure 6. 
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Half of a transverse section through a nearly completely mature proglottid of 
Oochoristica marmose, showing the embryos scattered through the parenchyma. 
m2. Nerve-cord. w.v. Water-vascular tubes. 
Particularly is the latter the case with the quite mature 
proglottids, where the embryos are surrounded by their shells. 
We may note before proceeding further with the description of 
the embryos the differences which the uterus shows in the two 
species dealt with in the present paper. In Oochoristica marmosce 
the uterus consists of a well-marked posteriorly situated transverse 
