Regrets delay in sending pamphlets for JDD.
Thanks him for information concerning cirripedes.
Sends thanks to Charles Pickering for information about plant distribution.
Discusses boring species of cirripedes.
Believes Harry D. S. Goodsir mistaken about parasites on Balanus ["Observations on organs of generation in Crustacea", Edinburgh New Philos. J. 36 (1843–4): 183–6]. In fact parasites are the males of the species.