. Journal of researches into the natural history and geology of the countries visited during the voyage round the world of "Beagle" under the command of Captain Fitz Roy, Beagle Expedition (1831-1836); Natural history; Geology; Voyages around the world. 134 RIO sidered as exaggeration. Yet I could never find a spot where, b\- slowl)' turning round, objects were not seen at greater distances in some directions than in others ; and this manifestly proves inequality in the plain. At sea, a person's eye being six feet above the surface of the water, his horizon is tw
. Journal of researches into the natural history and geology of the countries visited during the voyage round the world of "Beagle" under the command of Captain Fitz Roy, Beagle Expedition (1831-1836); Natural history; Geology; Voyages around the world. 134 RIO sidered as exaggeration. Yet I could never find a spot where, b\- slowl)' turning round, objects were not seen at greater distances in some directions than in others ; and this manifestly proves inequality in the plain. At sea, a person's eye being six feet above the surface of the water, his horizon is two miles and four-fifths distant. In like manner, the more level the plain, the more nearl}- does the horizon approach within these narrow limits ; and this, in my opinion, entirch' destroys that grandeur which one would ha\-e imagined that a vast level plain would have October \st.—W'c started b\' moonlight and arrived at the. TOXODON PLATENSrS. FOUKD !\T .'^AL.^DI LLO. Rio Tercero by sunrise. This river is also called the Saladillo, and it deserves the name, for the water is brackish. I stayed here the greater part of the day, searching for fossil bones. Besides a perfect tooth of the Toxodon, and many scattered bones, I found two immense skeletons near each other, project- ing in bold relief from the perpendicular cliff of the Parana. They were, however, so completely decayed, that I could only bring awa)' small fragments of one of the great molar teeth ; but these are sufficient to show that the remains belonged to a Mastodon, probably to the same species with that which formerly must have inhabited the Cordillera in Upper Peru in such great numbers. The men who took me in the canoe said. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Darwin, Charles, 1809-1882. London : J. Murray
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