Complex sentence: To these the author added "An Introduction to The Mammals of Australia" (1863) in a separate work, this provided corrections and updates, a new preface, introduction, and a list of the mammals of the three volumes.
Split into simpler sentences: To these the author added "An Introduction to The Mammals of Australia" (1863) in a separate work. This provided corrections and updates, a new preface, introduction, and a list of the mammals of the three volumes.