62 EVOLUTION AND THE 
organization attained by the allo- 
tropic product, where a vegetal 
matrix is transformed into an 
animal organism. 
16. The interchangeability of 
those organic forms which are 
derivable from originally similar 
vegetal matrices. 
17. The extreme variability of 
the simplest representatives of the 
Vegetal Kingdom. (Vol. II, 
pp. 150—165, and Appendix D.) 
18. The present existence 
amongst such lower organisms of 
all the gradations by which a 
purely sexual process of generation 
is gradually evolved. (Vol. IL, 
p- 552, and Zuadle.) 
19. The explanation of the mys- 
terious phenomena of ‘* Alternate 
Generation” —and_ especially of 
the anomalous exceptions in the 
case of Medusee with large eggs. 
20. The existence of multitudes 
of almost structureless organisms 
at the present day. (Vol. IL, 
pp. 605—62z2.) 
tions, by assuming them to be the 
faulty inferences of hasty or un- 
skilled observers. (Vol. IL, 
chaps. xx.—xxii.) 
16. Difficulties similar to those 
last-mentioned. (Vol. II., pp. 
491—499.) 
17. The impossibility of deny- 
ing the united but independent 
testimony of so many observers, 
although such variability seems 
irreconcilable with the notion of 
these organisms being direct con- 
tinuations of an extremely ancient 
similar matter which has resisted 
change for ages. 
18. The impossibility of finding 
any explanation of this fact which 
shall be consistent with an exclu- 
sive doctrine of Life-transmission 
and Homogenesis. 
19. The absence of all explana- 
tion, not only of the phenomena 
but of the exceptions thereto. 
(Vol. IL, pp. 560—571.) 
20. The impossibility of believ- 
ing that living matter could per- 
sist with so little change for 
100,000,000 years or upwards, 
whilst other portions of the same 
matter have progressively deve- 
loped into all the varied forms of 
Life that have appeared upon this 
globe. 
Taken as a whole, the amount of evidence, both 
deductive and inductive, seems, to say the least, 
