Jr2 Salisbury, \e\v Algoid Vegetations. 



form iirrangement may be noticed (fig. 13). In later and more 

 advanced stages of development they are usually homogeneous 

 throughout their entire length, no transverse markings being vi- 

 sible (figs. 14 and 15). The outlines of the filaments arc gene- 

 rally well defined. They occur either singly or in little knots, 

 running a more or less tortuous course. The filaments are repre- 

 sented at figs. 13, 14, 15 and 16. At fig. 16 the filaments are 

 covered with spores. This is an unusual occurrence. 



In some instances the pus-cells become filled with the spores 

 of this vegetation; the spores destroying the nucleus and cell- 

 granules of the mucus or pus-corpuscle, it becoming simply what 

 appears to be a spore-case or sporangium. These apparent spore- 

 sacs vary from the size of a pus-cell to three, four, and even five 

 times the size. They are represented at fig. 11. 



It is an interesting fact that this plant is limited in its in- 

 vasion to the epithehal tissue, while the Crypta syphilitica con- 

 fines itself mainly to the connective , cartilaginous , and osseous 

 tissues. This explains why, perhaps, the latter produces consti- 

 tutional derangements, while the former does not. 



