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Darwin Correspondence Project

DCP-LETT-8669

From Ernst Haeckel1   10 December 1872

This letter is not yet available online.

Summary

Thanks CD for Expression.

Describes work on Die Kalkschwämme and its principal conclusions.

The application of biogenetic law.

Notes variability among calcareous sponges.

Gastrula-like "Gastraea" as ancestor of multicellular animals.

Posits homology between Hydra, Olynthus of calcareous sponges, and initial germ layers of higher animals.

Comments on Lubbock’s Prehistoric times [1865]

and on David Strauss’s Der alte und der neue Glaube [1872].

Letter details

Letter no.
DCP-LETT-8669
From
Haeckel, E. P. A.
To
Darwin, C. R.
Sent from
Jena
Source of text
DAR 166: 34, 59
Physical description
8pp (German)

Summary

Thanks CD for Expression.

Describes work on Die Kalkschwämme and its principal conclusions.

The application of biogenetic law.

Notes variability among calcareous sponges.

Gastrula-like "Gastraea" as ancestor of multicellular animals.

Posits homology between Hydra, Olynthus of calcareous sponges, and initial germ layers of higher animals.

Comments on Lubbock’s Prehistoric times [1865]

and on David Strauss’s Der alte und der neue Glaube [1872].

Please cite as

Darwin Correspondence Project, “Letter no. 8669,” accessed on 13 February 2016, http://www.darwinproject.ac.uk/DCP-LETT-8669

letter