SMALLPOX, SYPHILIS, CANCER, ETC. 189 



shown in 16. The lobed chromatin body in this case was 

 translucent, probably from the chromatin being very finely 

 divided ; the linin system pervades the whole of the cyto- 

 plasm, making lines which converge at the points where 

 amoebulae are being formed. Near this cell are a free 

 amoebula and four leucocytes ; the latter are quite easily 

 distinguishable, and appear not to have been phagocytic as 

 regards the amoebulae, none of which are seen inside them. 

 Other modes of amoebula-formation are shown in Fig. 54. 



To explain modes of subdivision the descriptions of 

 Figs. 54 and 55 will suffice for the average cases, but I invite 

 attention especially to Fig. 55 ; 12, and 15 to 19. In 12 a 

 parasitic mass is breaking-up into stellate amoebulae like 

 those seen in abundance in the mammary sarcoma. 



A choriocarcinoma and some parasitic nuclei. In 15 to 

 17 are seen parasites whilst still inside the host-nucleus to 



FIG. 55. VARIOUS STRUCTURES IN THE CHORIOCARCINOMA. 1, Free 

 chromidial parasite ; 2, intracytoplasmic parasite ; 3, 4, free parasites 

 with peripheral chromatin granules ; 5, free chromidial parasite with 

 a nucleiform chromatin-net ; 6, free parasite with chromatin granules ; 

 7, ibid., with temporary nucleus-like bodies ; 8, nucleated filaments 

 and a spiral attached to an oval body ; 9, several intracytoplasmic 

 bodies, some assuming spiral form ; 10, plasson masses splitting into 

 spirals ; 11, Leydenia-form free in blood-vessel ; 12, two parasitic 

 masses in a blood-vessel breaking up into stellate amoebulae ; 13, intra- 

 nuclear parasite with knobbed processes ; 14, similar parasite escaping 

 into cytoplasm ; 15, intranuclear parasite with granular extensions ; 

 16, ibid., with extensions in the form of stellate amoebulae ; 17 ibid. ; 

 18, end-view of mitosis in a parasite ; 19, ibid., profile ; 20, intra- 

 nuclear parasite in mitosis with chromidial granules outside the 

 nuclear figure. X 800. From Part IV. 



