Thanks AG for answer about Galaxias.
Asks him to mention questions about the ears of Mus to other naturalists.
Will send another copy of Chauncey Wright’s pamphlet [Darwinism (1871)].
AG has proved Ceratodus to be a "wonderfully interesting creature" ["Descripton of Ceratodus", Philos. Trans. R. Soc. Lond. 161 (1871): 511–72].