To Dr. Couto de Magalhaês Mr. Agassiz was indebted for unremitting attentions during our stay in the region of the Amazons. He never failed to facilitate the success of the expedition by every means in his power, and the large collections made under his directions during our sojourn upon the Upper Amazons were among the most valuable contributions to its scientific results. When he heard that Mr. Ward, one of our young companions, was coming down the Tocantins, he sent a boat and boatmen to meet him, and on his arrival in Pará received him in his own house, where he remained his guest during his stay in the city. Footnote 48: This mushroom belongs to the genus Phallus, and seems to be an undescribed species. I preserved it in alcohol, but was unable to have any drawing made from it before its beauty and freshness were quite gone. In the early morning, while the grass was still damp, we often found a peculiar snail, a species of Bulimus, creeping by the roadside. The form of the anterior part of the foot was unlike that of any species known thus far from this group. Such facts show the desirableness of making drawings from the soft parts of these animals as well as from their solid envelopes.—L. A. Footnote 49: The President of this line is the Baron de Mazá, esteemed by his countrymen as a financier of great ability and a man of rare energy, perseverance, and patriotism. As he was in Europe during the year of my visit to Brazil, I had not the pleasure of a personal acquaintance with him, and I therefore welcome this opportunity of thanking him for the liberality shown in all their dealings with me by the company of which he is the moving spirit.—L. A. Footnote 50: ON BOARD THE ICAMIABA, ON THE AMAZONS, August 20, 1865.