PLATE LV. 



PIO. 123. Pleural side ef pencilled centrum tendineum of a guineapig, in which there was chronic inflam- 

 mation of the serous membranes, in consequence of artificially induced tuberculosis, a. Lymph capillaries of 

 the pleural serosa surrounding an island of ground-substance. In the latter is the canalicular system, with 

 the nucleated flat cells. 6, which it contains. These cells, in various places, are seen to be dividing; and 

 most of them are branched, o. The endothelium of the lymph capillaries is distinctly seen in several places 

 to be in continuity with the cells of the canalicular system. (Oc., 3; Obj., 7. Tube not drawn out.) 



