154 DR. E. KLEIN AND PROFESSOR BURDON SANDERSON. 



sinuses may be also thus formed as shown by one of the 

 authors in this Journal (Q. J. M. S., Jan., 1872.) 



The same process of vacuolation may occur and play the 

 same part in the cells of the new structures (buds, &c.) above 

 described. Finally, by opening on the surface the vacuo- 

 lated cells may form true stomata. 



On the occurrence of parasites and fungi within the vacuo- 

 lated cells and the lymphatic sinuses, we have not sufficient 

 experience to come to any decided conclusion. 



We have little to add to what is already known of the lym- 

 phatic system of the costal pleura and mesentery. In their 

 normal anatomical characters and the phenomena of chronic 

 inflammation, tliey agree generally with what has been stated 

 about the centrum tendineum. The details of the methods 

 by which the above results were arrived at, precise literary 

 references and confirmations of the chief facts alleged, will 

 be given elsewhere. 



