• "a matrix of dark-coloured, fine-grained, micaceous sandstone belonging to the rocks of Mount Potts, in the Rangitata district of the Province of Canterbury. Dr. Haast thus describes the strata from which the specimen in question was obtained:—The beds are here 'represented by a great thickness of dark shales, often becoming so slaty that they may be termed clay-slates, alternating with thinner layers of sandstone, sometimes with a ferruginous or calcareous matrix. Amongst these occur a few beds of conglomerate, which fairly may be termed bone beds, as they consist, besides boulders and pebbles of light-coloured slates, of great quantities of well-rounded pieces of bones and broken shells. The former often show considerable dimensions. I was thus able to measure the proximal end of, probably, a humerus, which I found to be 8 inches across, and some other bones of similar dimensions. However, the bones, as before observed, were so much rolled, and the cementing medium of such considerable hardness, that I was unable, with the tools at my command, to procure any characteristic specimens, but I have no doubt that they are of Saurian origin. No teeth were visible amongst this bone breccia.'"