SINCE October 1872 I have been growing potatoes, healthy and diseased, under test conditions, principally with a view to a further insight into the winter and subterranean life of the Peronospora and also in the hope of meeting with the (to me) apocryphal Artotrogus. The figures of the latter referred to by Mr. Berkeley, I am well acquainted with, as I have engraved them three times, once to illustrate Mr. Berkeley's own paper in the Gardener's Chronicle. I therefore well knew what to look for in the corroded cellular tissue of my diseased potatoes. I by no means wish to assert (or indeed asserted) that Volutella ciliata is positively the same with Montague's Artotrogus, for I have never seen a specimen of the latter, (I know no one who has except Mr. Berkeley), and as far as I am aware no one has met with it since the time of its original publication, between twenty and thirty years ago. As no one now (including Mr. Berkeley) ventures to suggest more than the â possibleâ or â probableâ nature of Artotrogus, my note was meant to suggest another reasonable direction for future observation.