rival theories as to the main facts employed. Apparently every capital fact
in the one view is a capital fact in the other. The difference is in the
interpretation. To run the parallel ready made to our hands: [I-4]


"The simultaneous existence of the most diversified types under identical
circumstances . . . the repetition of similar types under the most
diversified circumstances . . . the unity of plan in otherwise
highly-diversified types of animals . . . the correspondence, now generally
known as special homologies, in the details of structure otherwise entirely
disconnected, down to the most minute peculiarities . . . the various
degrees and different kinds of relationship among animals which (apparently)
can have no genealogical connection . . . the simultaneous existence in the
earliest geological periods, . . . of representatives of all the great
types of the animal kingdom . . . the gradation based upon complications of
structure which may be traced among animals built upon the same plan; the
distribution of some types over the most extensive range of surface of the
globe, while others are limited to particular geographical areas . . . the
identity of structures of these types, notwithstanding their wide
geographical distribution . . . the community of structure in certain
respects of animals otherwise entirely different, but living within the
same geographical area . . . the connection by series of special structures
observed in animals widely scattered over the surface of the globe . . .
the definite relations in which animals stand to the surrounding world, . .
. the relations in which individuals of the same species stand to one
another . . . the limitation of the range of changes which animals undergo
during their growth . . . the return to a definite norm of animals which
multiply in various ways . . . the order of succession of the different
types of animals and plants characteristic of the different geological
epochs, . . . the localization of some types of animals upon the same points