1905.] On the Cytology of Mali guard Growths. 



353 



Plate 11. 



Fig. 7. — Cell from an example of Decidua malignum, showing the later phases of the 



heterotype mitosis. 

 Fig. 8. — Similar Cell from an Epithelioma of the Tongue. 



Fig. 9. — Cell from the Testis of Man, showing the later stages of the heterotype division. 



Compare with figs. 7 and 8. 

 Fig. 10. — Cell from a Cancer of the Rectum, showing the somatic or premaiotic character 



of the chromosomes and the large number of these elements. 

 Fig. 11. — Cell from an early Cancer of Rectum, showing the peculiar condition of the 



nucleus, which suggests aniitosis ; also two leucocytes {a) within the cytoplasm. 

 Fig. 12. — Cell from the same showing nucleus in the prophase of division, and also an 



intruded leucocyte («), with its nucleus in the same phase. 

 Fig. 13. — Cell from Cancer of the Rectum, showing nucleus in division, and that of 



intruded leucocyte (a) in ;\ late prophase. 



Plate 12. 



Fig. 14. — Portion of the Testis of a Guinea-pig, showing spermatids with developing 



archoplasmic vesicles and centrosomes. 

 Fig. 15. — Portion of the Testis of a Guinea-pig, showing a later stage in the development 



of the archoplasmic vesicle. In this the origin of the tail of the spermatozoon is also 



seen, in connection with one of the centrosomes. 

 Fig. 16. — Portion of the Testis of a Guinea-pig, showing the remains of the archoplasmic 



vesicle becoming converted into the so-called "cephalic cap" (a) of the spermatozoon. 

 Fig. 17.— Cells from a Cancer of the Breast, showing Plimmer's bodies and the position of 



the centrosomes. Compare with figs. 13 and 14. 



