Points out some errata in the Origin.

Discusses the factors producing the shape of the cells of the honeycomb.

Reports case of two varieties of musk-rat that behave very differently but are, according to Waterhouse, the same.

Has been writing a notice of H. W. Bates’s "capital book" [Naturalist on the river Amazons (1863)].

P. M. Duncan’s coral paper [J. Geol. Soc. Lond. 29 (1863): 406–58] strengthens SPW’s belief in the general diffusion of marine forms westward in the course of time.