584 
DR. MARTIN BARRY’S RESEARCHES IN EMBRYOLOGY. 
situation and their greater size. These two constituted the essential 
portion of the contents of each parent cell. All the others, as well as 
the investing membranes, had been destined to disappear by liquefaction. 
Sixteen cells would thus have formed the succeeding set. The larger 
of the young cells presented irregularities in their membranes, as if 
thus prepared for rapid distention. Several minute cells, which had 
escaped liquefaction (par. 350.), were visible in the transparent fluid of 
the ovum. 100 diam. 
Fig. 213 A. The germ in an ovum of thirty-six hours, found in the Fallopian tube, 
and measuring in diameter It was taken from the same Rabbit as 
the ova in the two preceding figures, and the object in fig. 213 B. This 
germ consisted of eight cells (par. 352.) — each about — which were 
in a condition resembling that of the corresponding cells in fig. 212. 
They are here represented in outline only, to show the irregularity with 
which they are aggregated together. 100 diam. 
Fig. 213 B. An outline representation of eight cells constituting the germ (par. 
352.) in another ovum from the Rabbit which yielded figs. 211. 212. 
and 213 A. These cells corresponded in size and condition to those in 
the last figure, differing only in their mode of aggregation. 100 diam. 
Fig. 214. The outline of cells constituting the germ in an ovum of 57^ hours, found 
in the Fallopian tube, and measuring in diameter It was taken 
from the same Rabbit as the objects in figs 215 to 219. These cells 
varied in size from about and less, to g^"'. (In another instance 
they measured ^ 0 -"' to g^, that is, the germ was in a more advanced 
state). Some of the cells in this figure (fig. 214.) seemed to correspond 
to the cells in figs. 213 A. and 213 B ; while others, of a smaller size, 
appeared to be part of a new set. And this is the more probable, from 
the whole number having exceeded eight. (See the explanation of figs. 
211. 212. 213 A. 213 B.). 100 diam. 
Fig. 215. Outline of cells constituting the germ in an ovum of 57^ hours, and mea- 
suring in diameter from the Fallopian tube. This ovum was taken 
from the same Rabbit as the objects in figs. 214. 216 to 219. The cells 
were rather more numerous than those in fig. 214, and the proportion 
of smaller ones had increased (par. 354.) ; denoting a more advanced 
state (see the mode of origin of new cells, in the explanation of many 
of the preceding figures). 100 diam. 
Fig. 216. The same object on a smaller scale. The transparency in the centre of 
each cell was found to be referable to the presence there of cells of larger 
size than that of the cells in a more external situation. 50e?/«m.(par.357.). 
Fig. 217- One of the cells of the two preceding figures (see the explanation of fig. 
216.). 100 diam. 
