During a stay of nearly six weeks, made last July and August, at the Lizard, Cornwall, I had ample opportunity of correcting former, and making some fresh observations.

With regard to the first of these, and to some of the strictures recently passed on them, I found that I had little or nothing to regret as to what I had already written on the subject, with the exception of the “felsitic-like-rock” at Housel Cove, which I should now rather regard as a mass segregated, or separated out of the common magma, common magma, than as an altered portion of the hornblende-schist as I then described it—my object at the time being to show that it was not a dyke; a view I am still convinced of. I now pass on to recent observations.