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



motion ; effecting a change of place (see par. 126.). Examined twenty- 

 four hours after death. 



Fig. 107. Ox; foetus of eighteen inches. From the retina. Capillary vessels, 

 forming out of corpuscles, having the same appearance as young cor- 

 puscles of the blood. These corpuscles, while still red (a), apply them- 

 selves together so as to form a necklace-like object, composed of ellip- 

 tical beads : and having coalesced, and become pale ()3), and the mem- 

 branous partitions having disappeared, they form a tube. The corpuscles 

 seem to apply themselves at certain parts in such a manner as to form 

 a branched vessel. Resolving themselves (here, as well as when form- 

 ing other tissues) into discs, the corpuscles contain within themselves 

 the elements of new corpuscles. See a in the upper part of the figure, 

 y. Group of blood-corpuscles, and what seemed parts of blood-corpus- 

 cles (chiefly in outline), which may serve as a specimen of the many 

 forms of these corpuscles, observed along with the foregoing. The 

 central corpuscle in this group, resembles one of those marked ^ in 

 fig. 63 ; where the nucleus of the blood-corpuscle is forming the pus- 

 globule. (Blood-vessels seen forming in the same manner, and out of 

 similar objects, in the retina of a chick ; the egg incubated ten days.) 



Fig. 108. Ox; foetus of about seven inches. Outline of blood-corpuscles, observed 

 among fibres from a muscle of the thigh. Most of these corpuscles 

 were orange-shaped or globular, and exhibited an orifice. Some of 

 them presented discs in their interior. The minutest objects in this 

 figure were of the same colour as the larger ones, — blood-red. 



Fig. 109. Ox; foetus of about seven inches. Corpuscles having the same appear- 

 ance as blood-corpuscles, observed among fibres from a muscle of the 

 thigh. They appeared to be passing into the elements of cellular tissue, 

 a. The corpuscle has one large orifice. /3, /3, j3, /3, (3. It exhibits two 

 or more small orifices, y. The corpuscle has passed into a mass of 

 discs ; this mass being, not cylindrical, but flattened. In such objects 

 as /3 and y, the outline of discs is hidden, apparently, by red colouring 

 matter. 



Fig. 110. From the same. Altered corpuscle, having the same appearance as a 

 corpuscle of the blood. It had become a mass of discs resembling those 

 marked y in fig. 109, but terminated at each extremity in a fibre ; thus 

 presenting a more advanced stage in the formation of cellular tissue. 



Fig. 111. Ox; foetus of about five inches. Altered corpuscles having the same 

 appearance as blood -corpuscles, passing into cellular tissue. The fila- 

 ments into which the corpuscles are prolonged, consist of coalesced 

 discs. Colour quite red. Taken from under the superficial muscles of 

 the neck. 



