English: Cervus megaceros Hibernicus- The head and horn-beams of what appears to be the remains of one of the oldest animals of the Irish fossil elk yet recorded. The superior maxillary bone is imperfect; the infra-orbital apertures are very oblique, only 2- inches beneath the burr or crown, and the approaching edges of the burr are but three inches asunder; while in No. 3 that space is 43 inches wide, and in No. 9 it is still larger, so that these distances may, with other circumstances, be taken as indications of age. The breadth between the orbits is 91 inches. The right palm only remains, and is deeply grooved for the large arterial network which ramified on being the largest yet recorded-, except that Irish specimen at Knowle Manor Rouse, in Kent, mentioned by Professor Owen. The brow antlers, although the largest at their bases, of any yet described, are unfortunately imperfect towards their extremities; where they spring from the base of the beam, they are deeply grooved, and the anterior and outer surfaces of the horn-beam itself also present deep indentations, which spread upwards and outwards along its edge into the antler; the teeth are worn to the crown, and several of the alveoli have been absorbed. Taking all the circumstances of this very old head, figured on the opposite page, into consideration, I think the approach of the pedestals and horn crowns to each other, the obliquity and the distance of the orbital holes from the base of the horns, and especially the grooving of the horn-beam upwards and outwards from the brow antler, may be taken as indications of extreme age in this animal. This specimen, as also No. 10, was presented by Algernon Preston, who has lately written to me to say " they were found at Chapelizod.