214 
DR. MARTIN BARRY ON THE CORPUSCLES OF THE BLOOD. 
tion of finely granular substance beneath it, having a minute central 
and pellucid cavity (see the description of fig. 43.). s. The nucleus con- 
sists of two discs. Z,. One of the two discs of which the nucleus is com- 
posed seems preparing to divide into minuter discs. ??. The nucleus 
consists of three discs. &. The nucleus is composed of several discs, 
surrounding a pellucid cavity, i. The nucleus consists of many discs. 
k. Globular corpuscle filled with discs, apparently young corpuscles. 
Fig. 46. Common Fowl ( Phasianus G alius, Linn.), in an egg incubated 166 hours. 
Outline of corpuscles of the blood. 
Fig. 47- From the same egg. Two blood-corpuscles after the addition of acetic 
acid. The drawings of the discs, or incipient cells, around the nucleus 
in these are more finished than those of the corresponding parts in many 
of the other figures, a. The nucleus consists of two discs. (3. It is 
composed of three objects, each of which seems to be dividing into two 
discs. 
Fig. 48. Turtle. Blood-corpuscles after the addition of acetic acid ; some of them 
in outline, a. The nucleus dividing into two discs. (3,(3. The nucleus 
consists of two closely adherent discs, y. The nucleus is composed of 
two discs ; the one lying across the other. 
Fig. 49. Turtle. Blood-corpuscles after the addition of acetic acid ; two of them 
in outline, a. The nucleus is a single disc. In one of these corpuscles 
there are represented discs or incipient cells. (3. Corpuscle beginning 
to collapse. 
Fig. 50. Frog ( Rana temporaria, Linn.). Blood-corpuscles after the addition of 
acetic acid ; one of them in outline only. a. The nucleus is a single 
disc. (3 . The nucleus is dividing into two discs, y. The nucleus con- 
sists of two distinct discs, cb The nucleus is dividing into three discs, 
s. The corpuscle contains many incipient cells. (The nucleus has not 
been represented in s.) 
Fig. 51. Thornback ( Raia clavata, Linn.). Blood-corpuscles, after the addition of 
acetic acid ; one of them in outline. Some remained elliptical, a. The 
nucleus is a single disc. (3. The nucleus is dividing into two discs, 
y. The nucleus consists of two distinct discs, cb Minute corpuscle filled 
with minuter cells ; its nucleus consisting of two closely adherent discs, 
s. Corpuscle, the nucleus of which consists of two compound globules. 
Compare with fig. 30 a, and fig. 34 s. 
Fig. 52. Skate ( Raia batis, Linn.). Blood-corpuscles, after the addition of acetic 
acid. The larger ones are in outline. (The greater number of the 
corpuscles seen were of the second and third size.) The corpuscles did 
not become globular on the addition of acetic acid. a. The nucleus is 
a single disc, but it is beginning to divide into two. At (3 this division 
