EXPLANATION OF PLATES. 85 



with endothelial cells, which, as in Fig. 6, are of a germina- 

 ting character. 

 d. Represent sinuses of those straight lymphatic vessels. 



FIG. 8. Peritoneal surface of a silver preparation of a centrum tendineum 

 of a guinea-pig which suffered from chronic infect, peritonitis (artificial 

 tuberculosis.) 



M. p. III. 7. 



a a and a^ a l Indicate the straight lymphatic vessels between 

 the tendon bundles, as in Fig. 7. 



b. Represent stomata which are plugged up by a substance which 



has become darkly stained by the reagent (fibrinous plug) ; 

 the endothelium which surrounds the stomata is in a state 

 of intensive germination, forming buds and villi, freely pro- 

 jecting over the surface ; on the latter ones cells are seen 

 to be in the state of detaching themselves by constriction 

 (lymphoid cells). 



FIG. 9. Silver preparation of the mesentery of guinea-pig in the same 

 morbid condition as that of Fig. 8. 

 M. p. III. 7. 



a. Common endothelium of the surface. 



d. The upper wall of a lymphatic sinus, which has become 



freely exposed to the surface ; the endothelial marking of 



that wall is clearly to be seen. 

 5. Stomata, which lead obliquely into the cavity of the lymphatic 



sinus. 



c. Germinating endothelium round these stomata, forming buds, 



which project over the free surface. 



PLATE III. 



FIG. 10. Silver preparation of the omentum of a guinea-pig suffering 

 from chronic infective inflammation. 



M. p. III. 7. 



a. The trabeculae of the fenestrated portion of the omentum, with 



its endothelial covering. 

 &. Freely-projecting villi, the top of which is covered with c 



germinating endothelium. 



