268 DR. 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 ^"' in length, as it lay crushed under apiece 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. 



