Da. MARTIN BARRY ON THE CORPUSCLES OP THE BLOOD. 215 



has proceeded further. At y, y the nucleus is dividing into three parts. 

 In one of the corpuscles 7, are seen, in outline, minute cells, i, J. 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, I appeared to be young blood-corpuscles ; of which a re- 

 presents the least advanced, and I 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 s ; 

 while the nucleus is smaller. At ri, 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, s of fig. 34, and e 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 s of fig. 34. from 



