attentions que je reçois partout où je m’arrête, je ne puis m’empêcher de croire que n’était le caractère généreux et hospitalier des Brésiliens et l’intérêt des classes supérieures pour le progrès des sciences et de la civilisation, je n’aurais point rencontré les facilités qui se pressent sous mes pas. C’est ainsi que pour me faciliter l’exploration du fleuve, du Pará à Manaos, M. Pimenta Bueno, au lieu de m’acheminer par le steamer régulier, a mis à ma disposition, pour un mois ou six semaines, un des plus beaux bateaux de la compagnie, où je suis instalé aussi commodément que dans mon Musée à Cambridge. M. Coutinho est plein d’attention et me rend mon travail doublement facile en le préparant à l’avance par tous les renseignements possibles. Mais je ne veux pas abuser des loisirs de Votre Majesté et je la prie de croire toujours au dévouement le plus complet et à l’affection la plus respectueuse De son très humble et très obéissant serviteur, L. AGASSIZ.[50] ----- Footnote 43: Mr. Agassiz was indebted to Mr. Hitch for valuable additions to his collections, and for many acts of kindness in behalf of the expedition. Footnote 44: Here, as elsewhere, I found ready and willing coadjutors among amateur collectors. On my return from the Amazons, many months later, I found collections made in my absence by Dr. Mendes and Senhor Barroso, who had been our companions on board the steamer. At Parahyba do Norte I was indebted in the same way to Dr. Justa. These collections will afford invaluable materials for the comparison of the Coast Faunæ.—L. A. Footnote 45: At a later period I owed to Dr. Braga far more than the ordinary courtesy extended to a stranger. I had informed him that Mr. St. John, then following the course of the Rio San Francisco, on his way to the province of Piauhy, would arrive in Maranham at the close of his journey. When he reached that city he was very seriously ill with fever. Dr. Braga took him into his house, where he was attended by him and his family as if he had been one of their kindred. I have, indeed, little doubt that my young friend owed his recovery to the considerate care with which he was treated under their kindly roof.—L. A. Footnote 46: These two Medusæ belong to the Rhizostomidæ, and I shall take an early opportunity to publish a description of them, with the drawings of Mr. Burkhardt.—L. A. Footnote 47: