234 On “ Pluammer’s Bodies” and Reproductive Cells. 
But the resemblances between what we have termed gametoid, and the 
true gametogenic cells now seem to be even more significant than they 
appeared to be at that time. Both classes of cells are autonomous to a 
very high degree, and both possess the faculty of continuous or intermittent 
multiplication independently of the tissue requirements of the organism. 
And finally both exhibit cellular and nuclear metamorphoses which not only, 
mutatis mutandis, resemble one another, but differ materially from those 
pertaining to the normal somatic cells. 
It is possible that the malignant elements are the outcome of a phylo- 
genetic reversion, as was suggested by Sir William Collins, but the matter is 
obscured by the disturbing influences that have been operative during the 
actual ontogeny of the cells and tissues from which these elements have 
sprung. If this be so, the connection apparent between gametoid and the 
true reproductive cells will acquire a still deeper significance. But we 
propose to reserve the discussion of this question for another occasion. 
In thanking those who have helped us with material we would mention 
especially Dr. Plimmer himself, who has most kindly placed preparations 
at our disposal. 
We would further record our indebtedness to the Imperial Cancer Research 
Fund for a grant in aid of our investigations. 
