Brazil -- Description and travel; Geology -- Amazon River Valley
_August 22d._—Yesterday we passed the day at the settlement mentioned
above. It consists only of the house of a Brazilian merchant,[51] who
lives here with his family, having no neighbors except the inhabitants
of a few Indian houses in the forest immediately about. One wonders at
first what should induce a man to isolate himself in this solitude. But
the India-rubber trade is very productive here. The Indians tap the
trees as we tap our sugar-maples, and give the produce in exchange for
various articles of their own domestic consumption. Our day at Tajapurú
was a very successful one in a scientific point of view, and the
collections were again increased by a number of new species. Much as has
been said of the number and variety of fishes in the Amazons, the fauna
seems far richer than it has been reported. For those of my readers who
care to follow the scientific progress of the expedition as well as the
thread of personal adventure, I add here a letter on the subject,
written a day or two later by Mr. Agassiz to Mr. Pimenta Bueno, in Pará,
the generous friend to whom he owes in a great degree the facilities he
enjoys in this voyage.
22 Aout, au matin: entre Tajapurú et Gurupá.
MON CHER AMI:—La journée d’hier a été des plus instructives, surtout
pour les poissons “do Mato.” Nous avons obtenu quinze espèces en
tout. Sur ce nombre il y en a dix nouvelles, quatre qui se trouvent
aussi au Pará et une déjà décrite par moi dans le voyage de Spix et
Martius; mais ce qu’il y a de plus intéressant, c’est la preuve que
fournissent ces espèces, à les prendre dans leur totalité, que
l’ensemble des poissons qui habitent les eaux à l’ouest du groupe
d’îles qu’on appelle Marajó, diffère de ceux des eaux du Rio do
Pará. La liste des noms que nous avons demandée aux Indiens prouve
encore que le nombre des espèces qui se trouvent dans ces localités
est beaucoup plus considérable que celui des espèces que nous avons
pu nous procurer; aussi avons nous laissé des bocaux à Breves et à
Tajapurú pour compléter la collection.
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