EXPLANATION OF FIGURES IN PLATE IV. (After Mallory.j 



The drawings "were made witli Ihc Al)l)0 camera lucii.la; projection on to table. 

 ZeioS apoehromatic liomogencoiis ininicrsion 2.0 mm., apcrt. 130, compen.sation 

 ocular 0. 



I'lG-^. 1 and 2 slio',v numerous largo and .small scarlet fe\-er bodies (stained light 

 blue) in and l;etween the epithi'lial cells of the rete muco.sum. In Fig. 1 is a 

 large l)ody in a lymph spaci' of the corium just underneath the epidermis. 

 Several of the bodies suggest fixation while in amceboid motion. 



Figs. 3, 5, and G are coar.sel\- reticulated forms wliicli may be degenerated 

 forms of the scarlet fever bodies, or stages in sporogony. 



Figs. 4, S, and 9 proba]:)ly represent stages preceding the radiate liodies. In 

 Fig. 9 the bodies lie in a lympli space. It shows also four small I'orms which 

 ha\'e ju.st got free from a rose'tte. 



Figs. 7, 10, II, 12, 13, 14, and 1.5 show different stages in the development of 

 (he radiate bodies. 



Fig. 10 is the earliest stage: there is a distinct central liody and a definite, 

 reirular arrangement of granules at the periphery. Figs. 7, 11, and 12 .show a 

 litde lati.-r .stage of de\'elopmeni ; 11 anil 12 are optical .sections, while 7 is a 

 surl'ace \-iew. Jloreover, in Fig. 7 the body lies free in a lymph space in the 

 coi-ium. The segments Ijegin to show a certain amount of lateral separation 

 from each other. Fig. 13 is a .still later .stage: the .segmiaits are increasing in 

 size and are more or less I'ree from each other, although most of them are still 

 attached to the central Ijody. In Fig. 14 (he segments are all free and enlarging, 

 although .still groupi-d aroimd the central liody. In Fig. 1 .') the liodies are still 

 grouped arouiul thi' central body, which is free and stains dei'ply with eosin. 



