Therefore colder
situations, must he owing to the same general law of vegetation.
The trees of Tierra del Fuego during no part of the year
entirely shed their leaves.
[4] Described from my specimens and notes by the Rev. J. M.
Berkeley, in the Linnean Transactions (vol. xix. p. 37), under
the name of Cyttaria Darwinii; the Chilean species is the
C. Berteroii. This genus is allied to Bulgaria.
[5] I believe I must except one alpine Haltica, and a single
specimen of a Melasoma. Mr. Waterhouse informs me, that of
the Harpalidae there are eight or nine species - the forms
of the greater number being very peculiar; of Heteromera,
four or five species; of Rhyncophora, six or seven; and of
the following families one species in each: Staphylinidae,
Elateridae, Cebrionidae, Melolonthidae. The species in the
other orders are even fewer. In all the orders, the scarcity
of the individuals is even more remarkable than that of the
species. Most of the Coleoptera have been carefully described
by Mr. Waterhouse in the Annals of Nat. Hist.
[6] Its geographical range is remarkably wide; it is found
from the extreme southern islets near Cape Horn, as far
north on the eastern coast (according to information given
me by Mr. Stokes) as lat. 43 degs., - but on the western
coast, as Dr. Hooker tells me, it extends to the R. San
Francisco in California, and perhaps even to Kamtschatka.
We thus have an immense range in latitude; and as Cook,
who must have been well acquainted with the species, found
it at Kerguelen Land, no less than 140 degs. in longitude.
[7] Voyages of the Adventure and Beagle, vol. i. p. 363. - It
appears that sea-weed grows extremely quick. - Mr. Stephenson
found (Wilson's Voyage round Scotland, vol. ii. p. 228) that
a rock uncovered only at spring-tides, which had been chiselled
smooth in November, on the following May, that is, within
six months afterwards, was thickly covered with Fucus digitatus
two feet, and F. esculentus six feet, in length.
[8] With regard to Tierra del Fuego, the results are deduced
from the observations of Capt. King (Geographical Journal,
1830), and those taken on board the Beagle. For the Falkland
Islands, I am indebted to Capt. Sulivan for the mean of the
mean temperature (reduced from careful observations at
midnight, 8 A.M., noon, and 8 P.M.) of the three hottest
months, viz., December, January, and February. The temperature
of Dublin is taken from Barton.
[9] Agueros, Descrip. Hist. de la Prov. de Chiloe, 1791, p. 94.
[10] See the German Translation of this Journal; and for the
other facts, Mr. Brown's Appendix to Flinders's Voyage.
[11] On the Cordillera of central Chile, I believe the
snow-line varies exceedingly in height in different summers.
I was assured that during one very dry and long summer, all
the snow disappeared from Aconcagua, although it attains the
prodigious height of 23,000 feet.
