which I hope he will publish in some Journal.
[2] A nearly similar abnormal, but I do not know whether hereditary,
structure has been observed in the carp, and likewise in the crocodile
of the Ganges: Histoire des Anomalies, par M. Isid. Geoffroy St.
Hilaire, tom. i. p. 244.
[3] M. A. d'Orbigny has given nearly a similar account of these dogs,
tom. i. p. 175.
[4] I must express my obligations to Mr. Keane, at whose house I was
staying on the Berquelo, and to Mr. Lumb at Buenos Ayres, for without
their assistance these valuable remains would never have reached
England.
[5] Lyell's Principles of Geology, vol. iii. p. 63.
[6] The flies which frequently accompany a ship for some days on its
passage from harbour to harbour, wandering from the vessel, are soon
lost, and all disappear.
[7] Mr. Blackwall, in his Researches in Zoology, has many excellent
observations on the habits of spiders.
[8] An abstract is given in No. IV. of the Magazine of Zoology and
Botany.
[9] I found here a species of cactus, described by Professor Henslow,
under the name of Opuntia Darwinii (Magazine of Zoology and Botany,
vol. i. p. 466), which was remarkable for the irritability of the
stamens, when I inserted either a piece of stick or the end of my
finger in the flower. The segments of the perianth also closed on the
pistil, but more slowly than the stamens. Plants of this family,
generally considered as tropical, occur in North America (Lewis and
Clarke's Travels, p. 221), in the same high latitude as here, namely,
in both cases, in 47 degs.
[10] These insects were not uncommon beneath stones. I found one
cannibal scorpion quietly devouring another.
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