Suggests time for AA to visit.
Showing 1–8 of 8 items
Suggests time for AA to visit.
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.
Discusses homologies in various animal groups.
Comments on Mivart [Genesis of species].
Thanks AA for a ‘splendid case of gradation of structure’.
Discusses exchange of books.
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.