of Edinburgh, Session 1885-86. 
929 
certain extent share mutually in nutriment and in waste products, 
and that thus, besides the characteristic specific protoplasm acquired 
through direct continuity, both germinal cells and developing embryo 
may accumulate a proportion of characteristic anastates and katastates, 
acquired as it were “pangenetically” from the organs of the body. 
§ 5. Much of the above interpretation may be summed up in 
reference to the genealogical tree. Starting from one of the familiar 
diagrams (a) expressing the 
genetic relationships of the 
various forms, the accompany- 
ing figures represent magni- 
fied fragments of the tree. The 
second figure (h) expresses the 
continuous alternate series of 
sex-cell and organism, the lat- 
ter becoming less and less dis- 
tinguished from its parent cell 
until the two practically coin- 
cide in the Protozoa. The 
parallel one ( c ) shows how the 
continuous immortal stream of 
protozoan life, which Weis- 
mann has so well described, is 
continued by that of the re- 
productive cells among higher 
animals. The gradually enlarg- 
ing leaves of the tree, which 
represent individuals, express 
in their relation to the base the 
gradual differentiation of the 
reproductive process, which is 
at first coincident with the 
disintegration and reintegration 
of the entire organism, but be- c b a 
comes as we ascend more and K 
Fig. 5 - 
more localised, the individual 
life also surviving more and more completely the katabolic and at 
first fatal act of reproduction. To represent the two sexes, a second 
VOL. XIII. 3 P 
