Discusses sending HD lice specimens. Asks him to check with G. R. Waterhouse.
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Discusses sending HD lice specimens. Asks him to check with G. R. Waterhouse.
Dicussion of some specimens from the Beagle voyage.
Sends HD a reference to human lice from Charles White 1799.
Discusses intestinal worms among humans.
Comments on origin of human races.
Sends four packets of lice and suggests writing to Dr A. Smith, "the S. African traveller", for assistance.
Can hardly believe he made a mistake in specimens sent to HD. Recopies numbers in case he transposed them. [Has to do with lice taken from a specimen of aperea and put into spirits during Beagle voyage.]
Has never heard of species of same genus [of parasites] being found on both birds and mammals, or different genera and species being found on animals in the domestic and wild states. Implications of this for relationship of aperea and guinea-pig.
Discusses HD’s information that same species of birds at remote stations have identical parasites. Urges him to investigate N. American land-bird parasites.
Is deeply interested in everything connected with geographical distribution, and the differences between species and varieties.