Sends a copy of his paper in Ibis [2d ser. 2 (1866): 88–109] on the birds of the Azores,

and one by G. R. Crotch on the Coleoptera [Proc. Zool. Soc. Lond. (1867): 359–91].

Has received a copy of an attack on CD ["Darwinian theory examined"] from the author, but does not know who it is.

Left his box of plants in dog-cart [on his visit to Down].

He is vexed that CD has had to write again about the index. He has no excuse except "the nature of the work itself".

Asks CD to write a letter on his behalf to John Murray. CJG plans to translate Eduard Maetzner’s Englische Grammatik [1860–5] if publication can be arranged.

The Cyprinodontidae family of fishes exhibits sexual differences as remarkable as any in reptiles or birds [Descent 2: 7, 9–10].

On ocelli.

Sexual differences and proportion of sexes in butterflies.

Coleoptera.

[See Descent 1: 310; 2: 132.]