90 EXPLANATION OF PLATES. 



FIG. 28. From the same mesentery of monkey as Fig. 25. 

 M. p. III. 8. 



F. Ground- substance not represented. 



a. Large, coarsely-granular nucleated elements, which contain 

 a various number of spherical or irregular globules of 

 different sizes, which are homogeneous in structure, and are 

 somewhat similar to fat globules, although they refract light 

 differently. 



PLATE VI. 



FIG. 29. A preparation similar to that shown in Fig. 24. 

 A vascularised patch of the normal omen turn of rabbit. 

 M. p. III. 8. 



a. Capillary blood-vessels. 



At I, their connection with the branched cells of the ground- 

 substance ; these places represent at the same time where 

 young capillaries are formed. 



c. The branched cells of the matrix. 



d. Similar ones of the ground-substance of the neighbourhood of 



the patch. 



FIQ. 30. From a pencilled silver- stained normal omentum of rabbit. 

 M. p. IV. 8. 



Representing a young patch, the ground-substance of which M is un- 

 stained. 



a. The lymph- canalicular system, with the corresponding branched 



nucleated cells. 

 I. Migratory cells, either perfectly detached from those branched 



cells or in a state of growing from them. 



c. Vacuolated element, which is a mere knob of a branched cell. 

 In d the vacuolation has gone so far that a vesicle is formed, 



the wall of which has differentiated in endothelial plates. 



(Development of a lymphatic vessel.) 

 At F division of the branched cells. 



FIG. 31. From a silver-stained mesentery of a monkey suffering from 

 chronic infective peritonitis. Representing a sprout freely projecting 

 over the surface. 



