94 EXPLANATION OF PLATES. 



is plugged up by a darkly-stained substance (fibrin) ; it is 

 probable that also here this stoma leads to a lymphatic 

 vessel, which is filled with lymph- corpuscles. 



/. Endothelium of the general surface. 



e. Enlarged endothelium seen in profile at the edge of the 

 fringe. 



FIG. 43. Fresh preparation of the same omentum as Fig. 41 . 

 M. p. III. 7. 



a. A venous capillary vessel, filled with blood. 

 &. An invaginating lymphatic vessel. 



c. Outer endothelial wall. 



e. Inner (covering the blood-vessel) endothelial wall of the 

 lymphatic vessel. 



d. Endo-lymphangial reticulum, which is continuous with the 



endothelial wall of the lymphatic vessel. In this way endo- 

 lymphangial nodules and tracts are formed. 



FIG. 44. From an cedematous omentum of a monkey suffering from 

 chronic peritonitis. 



M. P . m. 7. 



a. An artery 



&. A vein filled with blood (not fully represented). 



c. A lymphatic vessel in which both the veins and the artery are 



invaginated. Many of the endothelial cells of the wall of 

 the lymphatic vessel are seen to be enlarged. 



d. Lymph-corpuscles which nearly have plugged up the lym- 



phatic vessel. 



PLATE IX. 



FIG. 45. A silver preparation of the centrum tendineum of a guinea-pig, 

 suffering from chronic infective inflammation of the serous membranes. 



M. p. III. 5. 

 Surface view of a portion of the peritoneal surface. 



a. The upper endothelial wall of a sacciform dilatation of a super- 

 ficial straight lymphatic capillary vessel ; the [endothelium 

 of the general surface of the serosa is somehow removed. 

 I. Large open stomata vera. 



