Second Living Cirripedia volume published. Asks THH’s advice on presentation copies for continental naturalists.
THH’s review of Vestiges of creation in [Br. & Foreign Med.-Chir. Rev. 13 (1854)]. CD is almost as unorthodox on species as the author of Vestiges, but hopes not quite so unphilosophical.
Hopes L. Agassiz was sounder on embryological stages than THH thinks.