(July, 
The germ-cell and the sperm-cell cannot be regarded as phys- 
ological or generative equivalents—leaving out of the account fr 
the present their morphological characters. They are physiolog 
ically differentiated, though not specialized in the sense in whid 
the component cells of the various tissues are specialized. Its 
the function of the cells of each of the different kinds of tissue, — 
as specialized cells, to form or secrete from substances derive’ — 
from the general plasma of the organism, some organic com- ; 
pound of specific constitution, which is either deposited in cos | 
tact with the protoplasm of the cell as a solid or semi-solid com 
ponent part of the structure of the tissue, or is thrown ones , 
liquid secretion by the bursting of the cell-wall. The functions 
of the two kinds of generative cells are not such that their dit | 
ferentiation from each other could be of a nature to rend 
them specialized in this sense. But since the office of sexua 
genesis consists in the production of organisms as wholes, a 
not merely of limited parts of organisms, we may fairly infer that 
in so far as the developmental process in general can be | 
into two essential factors, it is these two factors which pen 
the organic basis of the dual character of the function of i 
genesis, and therefore that it is with reference to these pare 
tors of the process that the two kinds of generative an e 
been differentiated, and not with reference to special prod ii 
the process. Two such general factors are Ci me i 
guished by biologists as comprised in and making up 
process of development, namely, growth ant 
since cell-division is the basis of differentiation, W of 38 
in the more strictly formative stage in the dee aie : 
organ or tissue, the two factors are cell-growth and one kind d : 
Hence the presumption on general grounds 1S, that t 
generative cells represents one of these factors, OF aod 
differentiation in the direction of one of these factor : 
other kind represents the other factor. indiate ® 7 
The facts sustained this presumption, and at youn 
which kind of generative cells each factor 1n an ex a 
belongs. peds 
Germ-cells attain a greater size than any other aggre 4 
Says Professor Minot: “ It is a rule, no exception than 
gaa „cell is much larger, 
lieve, is known, that the mature egg : N arosi : 
other cells in the body of the parent (Am. ’ 
670 The Theory of Sex and Sexual Genesis. 
