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OriginOfSpecies - 475 Rows
Column Type #Values Column Stats
id int(11) 475 Column Stats
subject varchar(80) 14 Column Stats
title varchar(250) 139 Column Stats
ordinal int(11) 30 Column Stats
description text 474 Column Stats

475 rows, page 67 of 119 (4/p)
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Export to Excel select * from OriginOfSpecies order by subject, title, ordinal limit 264, 4 (Page 67: Row)
06 - Difficutiles in Theory 06-01 - Difficulties on the Theory of Descent with Modification 50 The two first heads shall be here discussed.
Instinct and Hybridism in separate chapters.
06 - Difficutiles in Theory 06-02 - Transitions 10 As natural selection acts solely by the preservation of profitable modifications, each new form will tend in a fully-stocked country to take the place of, and finally to exterminate, its own less improved parent-form and other less favoured forms with which it comes into competition.
06 - Difficutiles in Theory 06-02 - Transitions 20
Thus extinction and natural selection go hand in hand.


Hence, if we look at each species as descended from some unknown form, both the parent and all the transitional varieties will generally have been exterminated by the very process of the formation and perfection of the new form.
06 - Difficutiles in Theory 06-03 - Absence or Rarity of Transitional Varieties 10 But, as by this theory innumerable transitional forms must have existed, why do we not find them embedded in countless numbers in the crust of the earth?

It will be more convenient to discuss this question in the chapter on the Imperfection of the Geological Record; and I will here only state that I believe the answer mainly lies in the record being incomparably less perfect than is generally supposed.

The crust of the earth is a vast museum; but the natural connections have been imperfectly made, and only at long intervals of time.