Suggests Englishmen who might provide sponge specimens.
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Suggests Englishmen who might provide sponge specimens.
Mentions views of Sars on species.
EH’s work on Siphonophora.
Comments on 5th edition of the Origin [1869];
preparation of second edition of Natürliche Schöpfungsgeschichte [1870].
The reception of CD’s theory. Mentions support of Pieter Harting and Michael Sars.
EH’s research on calcareous sponges and plans to publish monograph on them.
Thanks CD for assistance concerning sponge specimens. Mentions Englishmen who have sent specimens. J. S. Bowerbank has not answered requests.
Sends articles dealing with sponges and Medusae. Cites passages for CD to read. Suggests passages from Entwicklungsgeschichte der Siphonophoren [1869].
Describes meeting with Sars and his trip to Norway.