TWO NEW SPECIES OF CESTODES. 267 
oval spaces which intercommunicate. A more careful examination, 
however, under higher powers, does not entirely confirm such 
an impression. ‘There are undoubtedly cavities of varying dimen- 
sions in which one or more eggs often lie; these cavities are, to 
some extent, of irregular shapes, and their prolongations may 
anastomose. But there is no doubt that there are cavities con- 
taining eggs which are entirely isolated from the others. There 
is, In fact, nothing that can be described asa branched or retiform 
uterus with a continuous cavity. And it is to be observed that 
I am here speaking of the earliest proglottids in which the uterus 
oceurs—not of later segments where it might have been broken 
up into detached cavities. Moreover, a nearer inspection of some 
Text-figure 2. 
Linstowia ameive. 
Portion of a section through a ripe proglottid showing disposition of ova. 
e. Ova lying in parenchyma. e.m. Ova lying in definite uterine spaces. 
v.g. Remains of vitelline gland. w.v. Water-vascular tubes. 
of the egeg-containing cavities shows that they are traversed by 
delicate strands of tissue—that, in fact, they are not really all of 
them cavities, but are merely looser regions of the delicate 
network which chiefly constitutes the medullary parenchyma. 
Furthermore, plenty of eggs are placed singly between the 
meshes of the parenchyma enclosed in no special cavities and even 
lying just outside of such cavities as have been described above. 
Some of these eggs have already formed embryos; but perhaps 
the majority are still in the unicellular condition. These eggs, 
whether lying singly in the parenchyma or a few together in 
cavities, extend over much of the proglottid and are quite in 
