CHAPTER I.

VOYAGE FROM NEW YORK TO RIO DE JANEIRO.

PAGE

First Sunday at Sea.—Gulf Stream.—Gulf-Weed.—Lectures proposed.—First Lecture: On the Gulf Stream in the Gulf Stream.—Aquarium established on board.—Second Lecture.—Rough Sea.—Peculiar Tint of Water.—Third Lecture: Laying out Work of Expedition in Brazil; Distribution of Fishes in Brazilian Rivers; its Bearing on Origin of Species; Collecting of Eggs.—Tropical Sunset.—Fourth Lecture: Plan of Geological Investigations with special reference to Glacial Phenomena in South America.—Flying-Fish.—Fifth Lecture: Glacial Phenomena, continued.—Second Sunday at Sea.—Rough Water.—Sixth Lecture: Embryological Investigations as a Guide to sound Classification.—Seventh Lecture.—Moonlight Nights.—Trade-Winds.—Eighth Lecture: Importance of Precision in Localizing Specimens.—Southern Cross.—Ninth Lecture: Fresh-water Fishes of Brazil.—Easter Sunday.—First Sight of South American Shore.—Olinda.—Pernambuco.—Catamarans.—Tenth Lecture: Methods of Collecting.—Eleventh Lecture: Classification of Fishes as illustrated by Embryology.—Preparations for Arrival.—Twelfth Lecture: Practical Lesson in Embryology.—Closing Lecture: Transmutation Theory; Intellectual and Political Independence.—Resolutions and Speeches.—Singular Red Patches on the Surface of the Sea 1–45