hould be a litter, not of puppies, but of young Hyaenas. For the
Agamogenetic series is always, as we have seen, A: B: A: B, &c.;
whereas, for the production of a new species, the series must be A: B:
B: B, &c. The production of new species, or genera, is the extreme
permanent divergence from the primitive stock. All known Agamogenetic
processes, on the other hand, end in a complete return to the primitive
stock. How then is the production of new species to be rendered
intelligible by the analogy of Agamogenesis?

The other alternative put by Professor Koelliker--the passage of
fecundated ova in the course of their development into higher
forms--would, if it occurred, be merely an extreme case of variation in
the Darwinian sense, greater in degree than, but perfectly similar in
kind to, that which occurred when the well-known Ancon Ram was developed
from an ordinary Ewe's ovum. Indeed we have always thought that Mr.
Darwin has unnecessarily hampered himself by adhering so strictly to his
favourite "Natura non facit saltum." We greatly suspect that she does
make considerable jumps in the way of variation now and then, and that
these saltations give rise to some of the gaps which appear to exist in
the series of known forms.

Strongly and freely as we have ventured to disagree with Professor
Koelliker, we have always done so with regret, and we trust without
violating that respect which is due, not only to his scientific eminence
and to the careful study which he has devoted to the subject, but to the
perfect fairness of his argumentation, and the generous appreciation of
the worth of Mr. Darwin's labours which he always displays. It would be
satisfactory to be able to say as much for M. Flourens.

But the Perpetual Secretary of the French Academy of Sciences deals with
Mr. Darwin as the first Napoleon would have treated an "ideologue;" and
while displaying a painful weakness of logic and shallowness of
information, assumes a tone of authority, which always touches upon the
ludicrous, and sometimes passes the limits of good breeding.

For example (p. 56):--

"M. Darwin continue: 'Aucune distinction absolue n'a ete et ne peut
etre etablie entre les especes et les varietes.' Je vous ai deja
dit que vous vous trompiez; une distinction absolue separe les
varietes d'avec les especes."

"_Je vous ai deja dit_; moi, M. le Secretaire perpetuel de l'Academie
des Sciences: et vous

'Qui n'etes rie