The Genetic Cycle in Organic Nature Or the Succession of Forms in the Propaga
The Genetic Cycle in Organic Nature Or the Succession of Forms in the Propaga
George Ogilvie
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Dr. J. Reid's Anat. And Physio 1 . Researches, pp. 652-656. I5t> REPRESENTATION OF PROTOMORPHIC ALTERNATION VI REPRESENTATION OF PROTOMORPHIC ALTER- NATION IN THE EMBRYOGENY OF THE HIGHER ANIMALS. 1 . IN the foregoing remarks traces of reproduction by the co-operation of the sexes have been noticed, in all the leading groups of both kingdoms, of nature. This process still con- tinues to exist, side by side with that of gemmation, even in those lower forms of life, in which the latter is much th...e most conspicuous mode of propagation. Hence the enquiry naturally suggests itself, whether in the higher species, in which sexual generation is the only well-marked agency for the purpose of propagation, any associated phenomena occur which can be considered as corresponding to the gem- mation of the inferior classes ; and whether the alternation of the two processes, so striking in some of the lower forms, has any representation in the case of the higher organisms, and of those generally in which naturalists have recorded no change in the forms propagated from each other.
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