Chapter 6.1-6.9

Chapter Ⅵ: Difficulties Of The Theory
6.1 ---- 00:00
6.2 On The Absence Or Rarity Of Transitional Varieties ---- 02:04
6.3 On The Origin And Transition Of Organic Beings With Peculiar Habits And Structure ---- 17:01
6.4 Organs Of Extreme Perfection And Complication ---- 34:03
6.5 Modes Of Transition ---- 44:53
6.6 Special Difficulties Of The Theory Of Natural Selection ---- 55:23
6.7 Organs Of Little Apparent Importance, As Affected By Natural Selection ---- 77:48
6.8 Utilitarian Doctrine, How Far True: Beauty, How Acquired ---- 87:24
6.9 Summary: The Law Of Unity Of Type And Of The Conditions Of Existence Embraced By The Theory Of Natural Selection ---- 102:26