. Report upon the palaeontology of the province of Ontario [microform]. Paleontology; Paléontologie. â p 124 l^. Fig. 66. o. Phaenps rana Oreen, (head shield); 6. Pyf^idium of Proetus croisinuirginattu (Hall); c. P>'itidium of DahtMniUi £oothii (Oreen). with from eight to ten segments. The entire surface is covered with rounded granules, which Are of larger size on the anterior lobe of the glabella than elsewhere. Locality and Formation.âHamilton Formation, Widder, and near Arkona, Township of Bosanquet 156. CTTHERE ? PUNCTULIFEBA (Hall). BeyrichiapunctuUfera (Hall), Fifteenth Report on t
. Report upon the palaeontology of the province of Ontario [microform]. Paleontology; Paléontologie. â p 124 l^. Fig. 66. o. Phaenps rana Oreen, (head shield); 6. Pyf^idium of Proetus croisinuirginattu (Hall); c. P>'itidium of DahtMniUi £oothii (Oreen). with from eight to ten segments. The entire surface is covered with rounded granules, which Are of larger size on the anterior lobe of the glabella than elsewhere. Locality and Formation.âHamilton Formation, Widder, and near Arkona, Township of Bosanquet 156. CTTHERE ? PUNCTULIFEBA (Hall). BeyrichiapunctuUfera (Hall), Fifteenth Report on the State Cabinet, p. 111. " Carapace valves minute, semi-ovai, almost equilateral, the anterior end very slightly narrower, convex and abruptly bending downwards to the dorsal margin ; marginal rim well- developed, and sharply elevated on 'die ventral and lateral margins. The surface at the more prominent part above the centre, and just at the bending downwards towards the dor- sal margin, is marked by two very prominent nodes, which are nearly equidistant from the margins and from each other. The entire surface is punctate with minute rounded ; (Hall, Loc. cit). Hall states that this is the most abundant of the Ostracoda of the Hamilton group, and I can hardly doubt that it is identical with a pretty little carapace, which is of very common occurrence in the Hamilton shales of Bosanquet, and which has the same punctated surface and marginal rim. If this be the case, however, the species can hardly be referred to Bey- richia, and our specimens differ in some important respects from Prof Hall's description. The form is not semi-oval, but somewhat elliptical, with a long diameter of about one line and a short diameter of half a line, and having the posterior .extremity markedly broader than the anterior. The dorsal margins arerounded, not straight, and the nodes alluded to by Hall are very obscure.* The surface, on the other hand, is covered entirely with exc
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