Is mapping coral distribution on the Tortugas reef. His observations on the Florida peninsula suggest that it was built up from the debris of animal remains and was not elevated.
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Is mapping coral distribution on the Tortugas reef. His observations on the Florida peninsula suggest that it was built up from the debris of animal remains and was not elevated.
Discusses the structure and formation of the Florida peninsula. Part played by marine animals in building banks on which coral can thrive.
Asks whether he may see CD before leaving England.
Instances of sexual differences in viviparous fishes, suggested by reading chapters on sexual selection [in Descent] and by Mivart’s Genesis of species.
Notes on echinoderms.
Thanks for new [6th] edition of Origin.
Is working on Echini.
The more material he gets the less easy it is to diagnose a genus or species. Has little doubt that "classification is nothing but the most arbitrary convenient tool, depending upon the material at our command at a special time".
Thanks for Expression.
Has lost a year’s work in the fire that has devastated Boston.