In previous numbers of this Magazine, the writer has given the principal characters of the gigantic Ceratopsidœ, or horned Dinosaurs, from the Laramie, with figures of the more important parts of the skull and skeleton. The abundant material now available for examination makes it possible to attempt a restoration of one characteristic form, and the result is given in Plate VII. This figure, about one-fortieth of natural size, is reduced from a large outline plate of a memoir on this group, now in preparation by the writer for the United States Geological Survey.