DR. MARTIN BARRY ON THE CORPUSCLES OF THE BLOOD. 213 



having become in two instances oblique, in another instance situated 

 on one side. /3. It is dividing into two parts. 7. This division is com- 

 plete. 5. From the direction of the nucleus, only one of its extremities 

 is seen. The corpuscle in this instance had lost its flattened form, but 

 not yet become globular. 



Fig. 38. Sparrow (Fringilla domestica, Linn.). Nuclei of blood-corpuscles, after 

 the removal of the surrounding substance by acetic acid. 



Fig. 39. Sparrow (Fringilla domestica. Linn.). Two blood-corpuscles filled with 

 discs, or young corpuscles ; and two young corpuscles in nearly the 

 same state, but no longer contained within a parent corpuscle (cell). 

 Acetic acid had been added in minute quantity. 



Fig. 40. Common Fowl {Phasianus Gallus, Linn.) in an Q^g incubated eighty hours. 

 Outline of blood-corpuscles. An orifice is visible in some, and not in 

 others. 



Fig. 41. Blood-corpuscles from the same q^^, after the addition of acetic acid. 

 They are represented partly in outline, a. The nucleus consists of two 

 discs. (3. It is composed of several, y. Globular corpuscle filled with 

 young corpuscles. 



Fig. 42. Common Fowl {Phasianus Gallus, Linn.), in an e^^ incubated eighty-five 

 hours. Outline of blood-corpuscles. (Discs were indistinctly visible 

 in the interior, even before the addition of any acetic acid.) 



Fig. 43. From the same Ggg. Outline of blood-corpuscles, after the addition of 

 acetic acid. a. The corpuscle has an elongated orifice. |3. The corpuscle 

 is filled with minute cells. Its finely granular nucleus has a pellucid 

 cavity, communicating with the exterior of the corpuscle (compare this 

 object with the germinal vesicle, Phil. Trans. 1 840, Part II. Plate XXII. 

 fig. 159.). This orifice is originally larger. It becomes reduced in size 

 with the appearance of the finely granular substance : the latter pre- 

 ceding the formation of the discs, into which the nucleus is resolved. 

 y. The nucleus consists of two discs. §. The nucleus is composed of 

 several discs. 



Fig. 44. Common Fowl {Phasianus Gallus, Linn.), in an egg incubated ninety-two 

 hours. Outline of corpuscles of the blood. 



Fig. 45. From the same egg. Blood-corpuscles, chiefly in outline, after the addi- 

 tion of acetic acid. These were globular, or nearly so, excepting two, 

 which were elliptical. The latter form was not frequent after acetic 

 acid had been added. All the corpuscles in this figure were seen to be 

 filled with discs or incipient cells, a. Corpuscle with a large orifice. 

 (3. The nucleus finely granular, with a minute cavity (see the descrip- 

 tion of fig. 43.). y. The nucleus as in |3 ; concentric layers of discs or 

 incipient cells around it. h. The orifice elongated, with an accumula- 



2 f2 



