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Showing 1–20 of 21 items
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Has finished geographical distribution chapter and asks JDH to read it.
Is it just to say embryological characters are of high importance in plant classification?
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Will read JDH’s printers’ slips on variation.
CD has been so ill, he wonders whether he will get his book done, though so nearly completed.
Wants examples of insects (especially Diptera) in which embryo resembles adult, to show that the metamorphic stages may be lost.
No summary available.
Serial homologies in the Mollusca. Gives instances of repetition of homological parts in Radiata.
Outlines the basic categories of phanerogams.
Places Gymnospermae in the dicotyledons.
Evaluates the variable utility of embryological characters in plant classification.
Sends MS [of Origin] on geographical distribution. Wants JDH to correct facts and say what he most vehemently objects to.
Has received JDH’s note on plant embryology.
No summary available.
No summary available.
HW has confirmed the report in the Times of a shower of fish (minnows and sticklebacks) that fell on the Wedgwood colliery.
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Writes of events at Down: mostly of playing billiards on their new table.
Will finish last chapter (except recapitulation) tomorrow.
Pleased with JDH’s response to geographical distribution chapter;
CD disagrees with Lyell’s view that glacial epoch is connected with position of continents.
Embryology of Diptera. Development of insects; metamorphosis. JL feels all insects go through metamorphosis but that in some of them, part takes place before birth.
Wants JL’s opinion on paper by L. J. M. Dufour ["Études anatomiques sur les insectes diptères de la famille des pupipares", C. R. Hebd. Acad. Sci. 19 (1844): 1345–55].
Development of aphids; apparent absence of vermiform stage.
No summary available.
No summary available.