198 MALL. [Vov. XIX. 
the red corpuscles are partly broken down and appear as an 
imperfect granular detritus, within which there is a network 
of fibrin. There are as yet no pigmentary changes in the 
tissues adjacent to the clot. The clot extends through a tear 
in the chorion into the ccelom, and as this portion is ap- 
proached it is noticed that its characters change. The red 
blood corpuscles diminish in number, and the main coagulum 
consists of leucocytes which extend through the surrounding 
tissues. This mass of leucocytes also extends along the bor- 
Fic. 134c.—Myotome-like bodies, three of which are shown in the col- 
lapsed vesicle shown in Fig. a. 
der of the red clot into the cavity and walls of the vesicle. 
The blastoderm cells are intact on one side of the vesicle, 
whereas on the other they have suffered desquamation and 
have retracted from its walls. A part of the leucocytes com- 
posing this part of the clot are in a very imperfect state of 
preservation. They show great irregularities in the forms of 
their nuclei and are in a state of fragmentation. Fragmented 
leucocytes extend throughout the clot, a great portion of the 
chorion and through the walls of the embryonic vesicle. 
