es are different substances for that
species._ But upon comparing the corresponding substances
hemoglobins in different species of a genus it is generally found
that they differ the one from the other to a greater or less
degree; the differences being such that when complete
crystallographic data are available the different _species can be
distinguished_ by these _differences in their hemoglobins_'....
The facts thus far reported imply the suggestion that heredity of
the genus is determined by the proteins of a definite constitution
differing from the proteins of other genera. This constitution of
the proteins would therefore be responsible for the genus
heredity. The different species of a genus have all the same genus
proteins, but the proteins of each species of the same genus are
apparently different again in chemical constitution and hence they
may give rise to the specific biological or immunity reactions."
_The Organism as a Whole_, by Jacques Loeb.

"_All peculiarities which are characteristic of a race, species,
genus, order, class and phylum are of course inherited_, otherwise
there would be no constant characteristics of these groups and no
possibility of classifying organisms. The chief characters of
every living thing are unalterably fixed by heredity. Men do not
gather grapes of thorns nor figs of thistles. Every living thing
produces off-spring after its own kind, Men, horses, cattle;
birds, reptiles, fishes; insects, mollusks, worms; polyps,
sponges, micro-organisms,--all of the million known species of
animals and plants differ from one another because of inherited
peculiarities, _because they have come from different kinds of
germ cells_." Conklin.

"The entire organism consisting of structures and functions, body
and mind, develops out of the germ, and the organization of the
germ determines all the possibilities of development of the mind
no less than of the body, though the actual realization of any
possibility is dependent also upon environmental stimuli."...
Conklin.

"The development of the mind _parallels that of the body_;
whatever the ultimate relation of the mind and body may be, there
can be _no_ reasonable _doubt_ that the two develop together from
the germ. It is a curious fact that many people who are seriously
disturbed by scientific