[Recto is a list of Galapagos shells, by island, signed GBS. Verso is another list of shells in EF’s hand.]

Sends information on Gryphaea orientalis. [See South America, p. 212.]

Comments on G. B. Sowerby’s identifications of South American fossil shells [812]. [Notes from more than one original memorandum].

Has marked probable depths of the specimens on CD’s list of S. American shells. Asks for details which would provide more precise conclusions. [See South America, p. 226.]

Fears he cannot supply additional data [on shells].

Makes suggestions for Thomas Edmondston, naturalist on board the Herald, of places to visit and geological data to collect on proposed California expedition.

Answers CD’s objections with botanical and geological arguments supporting the existence of an ancient post-Miocene land extending over what is now the Mediterranean and past the Azores in the Atlantic [EF’s "Atlantis" theory in "On the connexion between the distribution of the existing fauna and flora of the British Isles and the geological changes which have affected their area", Mem. Geol. Surv. G. B. 1 (1846): 336–432].

Has completed descriptions of S. American fossil shells [for South America]. Proposes to name a Nautilus after A. D. d’Orbigny.

Returns corrected proof of his descriptions of S. American fossil shells [South America, appendix].

Comments on MS by C. S. Bate. Bate not aware of other work on Cirripedia; cites Bate’s errors. Would Bate allow CD to use his drawings in Living Cirripedia? [See Living Cirripedia 1: 9–16.]

Discusses Balanus unguiformis. Promises to return specimen.