DR. MARTIN BARRY ON THE CORPUSCLES OF THE BLOOD. 
215 
has proceeded further. At y, y the nucleus is dividing into three parts. 
In one of the corpuscles y, are seen, in outline, minute cells. S, &. The 
nucleus consists, in one corpuscle of two, and in another of three, di- 
stinct discs. 
Fig. 53. Cod ( Gadus Morrhua, Linn.). Blood-corpuscles after the addition of a 
minute quantity of acetic acid. They are represented for the most part 
in outline. The sizes and forms most frequent were such as those of 
the larger corpuscles on the left side in the figure, a. Discs or cell-like 
objects are contained within the corpuscle, around the nucleus. This 
was seen to be the case in corpuscles generally throughout the field of 
view. The nucleus consisted in general of two or more discs. (3. Glo- 
bular corpuscle filled with discs, apparently young blood-corpuscles. 
Fig. 54. Cod {Gadus Morrhua, Linn.). Blood-corpuscles after the addition of a 
minute quantity of acetic acid. Some of them are in outline only. The 
objects a, (3, y, appeared to be young blood-corpuscles ; of which a re- 
presents the least advanced, and ^ the most forward state (par. 79.). 
Discs or young cells were seen around the nucleus in all the larger 
corpuscles of this figure ; and indeed in the majority of such of the cor- 
puscles from this individual, as were minutely examined. They were 
visible in a great number of instances without any addition having- 
been made. The discs in the corpuscle £ are larger than those in e ; 
while the nucleus is smaller. At q, the crenate circle represents the 
outline of a layer of discs or young cells, which surrounded the nucleus. 
The space external to this layer, seemed to be occupied by red colour- 
ing matter. 
PLATE XIX. 
Fig. 55. Frog {Rana temporaria, Linn.). Nuclei of blood-corpuscles, and other 
objects, observed in the blood, after the addition of acetic acid, a Re- 
sembles the compound globules in figs. 30, 33, £ of fig. 34, and £ of 
fig. 51. 
Fig. 56. Nuclei of blood-corpuscles (and other objects?), observed in blood of the 
same animal, several days dead. These nuclei were no longer con- 
tained in cells. 
Fig. 57- Oyster ( Ostrea edulis, Linn.). Objects found in the blood, a. Cell, the 
nucleus of which consists of two closely adherent discs. Compare this 
cell with many of the blood-corpuscles from vertebrated animals in 
Plates XVII. and XVIII. (3, (3. Globules composed of three or more 
discs, y. Globules circumscribed by a membrane-like lamina, and 
composed of discs resembling those in figs. 30, 33, and £ of fig. 34. from 
