. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. Cyclonema sub-angulatum. {Pleurotomaria sul-angu- lata, Hall, Trans. Alb. Inst. Vol. 4,1856. Whitfield Bull. 3, Am. Mus. N. IL, 1882, plate 8.) Collett's Indiana Rt. of 1882, page 364, plate 31, fig. 32.— Sub-carloniferous limestone of Spergen Hill, etc.^ Ind. This species of Cyclonema can be distinguished from all the other species of the genus, by the flat- fish, shelf-like upper part of each whorl, with a sharply angular edge. This is the distinguishing fe
. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. Cyclonema sub-angulatum. {Pleurotomaria sul-angu- lata, Hall, Trans. Alb. Inst. Vol. 4,1856. Whitfield Bull. 3, Am. Mus. N. IL, 1882, plate 8.) Collett's Indiana Rt. of 1882, page 364, plate 31, fig. 32.— Sub-carloniferous limestone of Spergen Hill, etc.^ Ind. This species of Cyclonema can be distinguished from all the other species of the genus, by the flat- fish, shelf-like upper part of each whorl, with a sharply angular edge. This is the distinguishing feature of the casts of the shell. No striae parallel to the lines of growth have been observed. There are traces of finer striae between the coarser revolving striae, which latter are unequal in size and distance from each other. Compare (7. yvanii, Leville. (Hall.)—XI. Cyclopteris digitata. Europe. Near Whittleseya elegans. —Note. The first specimen of Cyclopteris leaf attached to the leaf stem (rachis) recorded, may be seen in A. C. Seward's fine lithograph page-plate X, facing page 344, of the London Geolo- gical Magazine for August, 1888, No. 290.—X/77. Cyclopteris elegans. (Lesquereux. Boston Jour. KlO 7 ^-^ Nat. Hist. Vol. 6, page 416. Geol. of Penn. 1858, page 856, plate 5, fig. 4, afterwards identified by Lesq. with NeurojAeris tenuifolia of Brongniart, described in Coal Flora (Report P), page 100. Grand'Eury and Saporta are inclined to place it and other species in a new genus Doleropteris ; see Coal Flora page 522.) Collett's Indiana Rt. of 1883, page 52, plate 10, fig. 7, where it is made identical with Neuropteris loschii.—P'ound by Lesquereux in the Darlington hed at Cannelton, Beaver Co., Pa. XIII, Cyclopteris flmbriata. See Neuropteris fimb. XIII Cyclopteris germari. See Neurpoteris germari. XIII Cyclopteris laciniata. See Neuropteris laciniata. XIII Cyclopteris undans. See Neuropteris dentata. XIII. Please note that these images are extracted from
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