DR. MARTIN BARRY’S RESEARCHES IN EMBRYOLOGY. 587 
(A central elliptic cell was undoubtedly present in the group, but could 
not be discerned.) 100 cliam. 
Fig. 231. An ovum from the same Rabbit as that in the preceding figure, found in 
the same part of the Fallopian tube, and of the same size (y ") ; but its 
thick transparent membrane (f) much more capacious. The cells of 
the central group or germ (bs) had ceased to present the remains of a 
nucleus (seen in the ovum fig. 230.), and in their interior were cells re- 
sembling those in figs. 218 and 221, but much more minute. 100 
diam. 
Fig. 232. An ovum of seventy-two hours, and of y, from the uterine extremity of 
the Fallopian tube. The cells of the central group or germ (bs) were 
globular. This group seemed to consist of two portions — an inner and 
an outer. The inner portion contained an elliptic cell of the same kind 
as the cells in figs. 225. 226 and 228; but its interior was dark, appa- 
rently from the presence of globules in its fluid (par. 359.). The outer 
portion of the group appeared to be expanding from the inner portion, 
to line the membrane f ( par. 361.). 100 diam. 
Fig. 233. An ovum of 57y hours, and ofy"+, from the uterine extremity of the 
Fallopian tube, in the same Rabbit as the ova from which figs. 223 to 
228. were taken, but in a state rather more advanced. In the mulberry- 
like object or germ (bs) there had commenced a process of distention 
which, if continued, would have brought most of its cells — together 
with the contained elliptic cell — into contact with the membrane f, at 
the same time that a cavity was forming in its interior (par. 362.). The 
elliptic cell (the nucleus (bb) of which is the rudimental embryo) was 
more pellucid (par. 359.) than that in fig. 232. 100 diam. 
Fig. 234. An ovum of 76y hours, and of y, from the uterus. The process men- 
tioned in the explanation of fig. 233. had brought the outer portion of 
the mulberry-like germ (bs) into contact with the membrane f; and 
the contained elliptic cell into near approximation to the same. This 
elliptic cell (the nucleus (bb) of which is the rudimental embryo) was 
less pellucid than the corresponding cell in fig. 233, its fluid presenting 
a granular appearance. The membrane /Hvas much less capacious than 
that in the preceding figure. 100 diam. 
4 f 2 
