Journal and proceedings of the Royal Society of New South Wales . he ammonoids:— Productus cora, dOrb. Productus spiralis, Waagen Chonetes , Waagen Spirifer rajah, Salter Spirifer (Reticularia) lineatus, Martin Martinia nucula, Rothpletz Retzia radialis, Phil!., (var. grctndicosta, Dav.) Notothyris Dielasma The present opinion of the geologists of the Dutch EastIndies is that the strata containing the above fossils areof Permian, mostly Lower Permian, age and that they arestratigraphically superior in position to the Upper Carbon-iferous Fusulina limestones of the same region.
Journal and proceedings of the Royal Society of New South Wales . he ammonoids:— Productus cora, dOrb. Productus spiralis, Waagen Chonetes , Waagen Spirifer rajah, Salter Spirifer (Reticularia) lineatus, Martin Martinia nucula, Rothpletz Retzia radialis, Phil!., (var. grctndicosta, Dav.) Notothyris Dielasma The present opinion of the geologists of the Dutch EastIndies is that the strata containing the above fossils areof Permian, mostly Lower Permian, age and that they arestratigraphically superior in position to the Upper Carbon-iferous Fusulina limestones of the same region. EXPLANATION OF PLATES. Plate XI. Gastrioceras Jacksoni, Eth. fil. Specimen showing umbilicalregion and form of lateral lobes and saddles. Plate XII. Gastrioceras Jacksoni, Eth. fil. Specimen shown in Plate suture line and general appearance of (septal surface.(See text figures 2 and 3). Plate XIII. Gastrioceras Jacksoni, Eth. fil. Ventral aspect of large individualshowing suture lines. Journal Royal Society W., Vol. L VI., 192& Plate XI. Journal Royal Society W., Vol. L PL, 1922, mate XIi.
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectscience, bookyear1867
