| OCR Text |
Show 458 MR. F. E. BEDDARD OX AVIAN BRAINS. [APr- X^' associated with A. magnum at Caclibona, Gelocus and Propalteo-chcerus, are somewhat older types. Moreover, the Upper Oligocene deposits of St. Gerand-le-Puy (Allier) contain no Anthracotheres, whereas in the nearly contemporaneous lignites of Pyrimont a more modern type of Anthracotheres than A. magnum is represented, viz., Brachyodus porcinus (Gerv.) *. These views are confirmed by the latest researches in the geology of the Limagnet, where the deposits containing Anthracotherium magnum are referred to the Middle Oligocene (Stampian), even to its lowest portion, so that we shall have to consider as Middle Oligocene also the Lignites of Caclibona and Majorca. Although remains of Anthracotherium are not rare in our collections, the various forms are not very well known, and many fossils have been called A. magnum which have little to do with the type species of Caclibona. In this respect also the remains obtained by Mr. O. Thomas increase our knowledge, and this discovery is certainly the most important result of his and Mr. R. I. Pocock's trip to the Balearics. EXPLANATION OF PLATE XXIX. Anthracotherium magnum Cuv. All figures natural size. Fig. 1. Penultimate right upper premolar, from below. Fig. 1 a, external; fig. 1 b, anterior view, x = inner cusp. Fig. 2. Incomplete second right upper true molar, external view. Fig. 2 a, lower view. pi. = anterior intermediate cusp, broken away in specimen fig. 3. Fig. 3. Second left upper true molar, posterior view. Fig. 3 a, lower view. Mr. F. E. Beddard, F.R.S., exhibited and made remarks upon a series of Avian brains, of which the arterial system had been injected. The following papers were read :- ebres oligocenes de Pyrimont-Challonges ). 41 (1902). Limagne (Auvergne)," Bull. Serv. Carte B). |
