CD has suggested an explanation of how pike were introduced to a remote lake in Ireland by cormorants [carrying pike spawn on their feet or in their gullets].
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The Charles Darwin Collection
The Darwin Correspondence Project is publishing letters written by and to the naturalist Charles Darwin (1809–1882). Complete transcripts of letters are being made available through the Project’s website (www.darwinproject.ac.uk) after publication in the ongoing print edition of The Correspondence of Charles Darwin (Cambridge University Press 1985–). Metadata and summaries of all known letters (c. 15,000) appear in Ɛpsilon, and the full texts of available letters can also be searched, with links to the full texts.
CD has suggested an explanation of how pike were introduced to a remote lake in Ireland by cormorants [carrying pike spawn on their feet or in their gullets].
Gives instances of sexual differences in the number of tarsi within species of Coleoptera and also variation in the number of tarsi between related species.
CD’s tabulation of colonists curious but explicable.
Working on Tasmanian flora; contemplating general essay on Australian distribution: Tasmania and Australia same alpine species; Swan River flora very peculiar and quite distinct from New South Wales.
Trying to establish new journal at Linnean.
Hybrid insects.
Description of the Salvages.
Variability of "transition groups" of insects; relation of variability to ranges of insects. The variability of wings, even within species. Reduction of flying ability on isolated islands.
Forbes’s "Atlantis" theory and insect fauna of the Atlantic islands, considered with regard to insect migrations.
Comparison of skulls of Ichthyosaurus and Cetacea.
Latitude overrules everything in distribution. Alpine distributions are like insular. Tabulating proportions.
T. V. Wollaston’s Madeira insects: many flightless, thus not blown to sea. TVW’s insects do not confirm Forbes’s Atlantis.
JDH criticises C. J. F. Bunbury’s paper on Madeira [J. Linn. Soc. Lond. (Bot.) 1 (1857): 1–35].
Absence of Ophrys on Madeira suggests to JDH a sequence in creation of groups.
Why are flightless insects common in desert?
Australian endemism.
Acknowledges a list [of plants?].
Looks forward to new edition [of British plants growing wild in the parish of Hitcham, Suffolk, 2d ed. (1855)].
JSH should not trouble about Anacharis until he is less busy. Will send cirripedes.
Thanks JSH for Anacharis which is flourishing.
P. H. Gosse told him he had several sea animals and algae living in artificial sea-water for over 13 months.