J. Wyman on some unusual modes of Gestation. 1] 
or “cupule,” for the support of the egg. It is composed almost 
entirely of fibrous tissue, invested with a layer of tesselated 
epithelium. In some instances when the eggs were but little 
advanced, numerous fusiform cells were detected among the _ 
fibres. It is vascular, two or three vessels reaching to the cup, 
where they ramify and form a somewhat extended capillary 
plexus. (Figs. 8 and 4). 
The eggs vary according to the degree of development from 
the 0:09 to 0°15'of an inch in diameter, and are covered with an 
external homogeneous membrane, containing minute puncti- 
form depressions—within this is a second, of a brownish color 
and composed of epithelium. The embryos which were the 
most advanced and just ready to hatch, had not as yet. com- 
bates absorbed the yolk, and were coiled up within the mem- 
tio 
The relation of the embryo to aes parent in this singular — 
mode of gestation cannot be determined very accurately, but 
the vascular plexus in the cup, seems ~ be ere sage is — 
sary for the mere nutrition of the increases 
size during incubation, those ova in hyn dexdlepioca! had but 
slightly advanced measuring from 0-09 to 0-11 of an inch in di- 
amatee while those nearly mature measured from 0-14 to 0-15 
of a n inch, How this increase of size of the embryo over the 
onsen size of the egg is actually obtained I have no facts to 
show, but either of two suppositions are probable; it may be 
by absorption of materials from the water which surrounds it, 
or from the capillary plexus of pee pedicles, and in this case in 
a manner analogous to that o a. 
ues 1854, og a, “the eggs you will receive are from an- 
