DR. W. WIGHT, referring to Watt and Mann's categories of leaf-form within the Assam variety of tea plant1, goes on to say: “Number of leaf veins was emphasized; but this has not proved to be a satisfactory criterion”. I may say at once that Watt was solely responsible for the leaf vein idea for separating the varieties of tea. When I wrote, with him, the second edition of the Pests and Blights of the Tea Plant I had to include the leaf vein idea, but I never was, myself, able to make anything out of it. I never agreed with Watt on this subject, and it was included in our book in deference to him. Thus, so far as I am concerned, the number of leaf veins was an unsatisfactory criterion fifty-seven years ago.