The origin of the Lower Trias is evidently a question of interest to the readers of the Geological Magazine. Professor Bonney, in an article, to the tone of which no exception can be taken, criticizes the view which I have ventured to put forth, and very properly supports his own. It would be impossible and a waste of paper and type for me to traverse all his statements, as in many cases my reply would amount to little more than a reproduction, in a different form perhaps, of the arguments already made use of. There are, however, one or two points on which I should like to express myself, and there are some misconceptions that require clearing up.