I have been favoured by Mr. G. E. Roberts with the inspection of a fossil from the London Clay of Sheppey, which indicates a genus of mammals distinct from Pliolophus and Hytacotherium, to both of which it is nearly allied. It consists of so much of the upper jaw (Plate X., fig. 1 ) as includes the six sockets of the molar series of each side, with the intervening bony palate and the anterior piers of the zygomatic arches: the upper part of this portion of skull has been crushed and filled up with compact septarian stone. The last, m 3, and penultimate, m 2, molars of both sides, and the last right premolar, p 4, remain in their sockets. In point of size they differ from those teeth in Hyracotherium leporinum in about the same degree as do those of Hyracotherium cuniculus, but exhibit a modification of generic value.

Having last summer accepted the kind invitation of Mr. J. Gwyn Jeffreys to be his guest on a dredging expedition to these Northern Isles, I was induced, by a request from Sir R. I. Murchison, to look out for any trace of glacial action that I might meet with there. The result of my observations I have thought right to lay before the British Association, apologizing for the meagre story I have to tell. This poverty arises partly from my resolve to devote all time possible to the zoological work, and partly from having seen so small a portion of these islands.

It was a dull December morning (but my companion and myself are no mere ‘parlour-geologists’) when we were bound for the Limestones and ‘Trap-rocks’ which lie about the valley of the Ceiriog, distant some eight or nine miles from Oswestry. After an early breakfast, we strapped on the munitions of war and looked well to the ‘commissariat’ and, determined to make the most of the short day-light, we turned our backs upon the good old town of Oswestry.