268 
DE. MARTIN BARRY ON THE CORPUSCLES OF THE BLOOD. 
brane, h, of the ovisac, we find them increasing in size, losing their 
high refracting power, and becoming pale. Where entering into the 
formation of the membrane h, they were largest, and undergoing a 
further division. Even the outermost of these discs g — those coalescing 
to form h — though very pale, presented a tinge of red. 
Fig. 172 . From the same ovary. Portion of the membrane of an ovisac, which 
was elliptical, and y in length, as it lay crushed under a piece of glass. 
It still presented a pale tinge of red, as well as traces of some of the 
discs of which this membrane is composed. 
Fig. 173. Canary bird ( Fringilla Canaria , Linn.). Part of an ovisac in dia- 
meter), with its contents ; the whole derived from a corpuscle having 
the same appearance as a corpuscle of the blood, and the whole still 
more or less red. Respecting g and h , see the explanation of the pre- 
ceding figures. (The figure does not represent the membrane of the 
yelk.) c. Germinal vesicle, containing reddish discs ; the minuter of 
which surround a central disc, which is the newest solid part. In the 
centre of the latter there is a dark point, representing (by refraction) 
a fluid space, — the situation of the future germinal spot. 
