. Bulletin - New York State Museum. Science. SOME NEW DEVONIC FOSSILS .207 r i g o m a g e n s i s Freeh, from the Coblentzian, A. reticulata Sowerb3\ from the Aymestry Hmestone, but such comparisons are resemblances only in one or another feature. No closely allied form is now recognized. Lozver Dcvonic. Dalhousie, N. B. Pterinea radialis nov. This is one of a group with an Actinopterialike exterior, but it has the highly developed anterior muscle scar, the umbonal and the lateral teeth of Pterinea. No attempts therefore at correlation with species which have been determined as Actinopteria a
. Bulletin - New York State Museum. Science. SOME NEW DEVONIC FOSSILS .207 r i g o m a g e n s i s Freeh, from the Coblentzian, A. reticulata Sowerb3\ from the Aymestry Hmestone, but such comparisons are resemblances only in one or another feature. No closely allied form is now recognized. Lozver Dcvonic. Dalhousie, N. B. Pterinea radialis nov. This is one of a group with an Actinopterialike exterior, but it has the highly developed anterior muscle scar, the umbonal and the lateral teeth of Pterinea. No attempts therefore at correlation with species which have been determined as Actinopteria and Avicula are here called for. The shells have the size and propor-. Pterinea radialis â Upper figures the usual form at Chapman Plantation; lower figures exemplify the attained at Matagamon lake. tions of the foregoing (P. cf. fasciculata) and the following species. The hinge line is but slightly extended posteriorly, the anterior wing well marked, convex and sulcated; the crescence line oblique and the valve highly convex in the umbonal region, with abrupt anterior and more gradual posterior slope. The sur-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original New York State Museum; New York State Museum. Albany : New York State Education Dept
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectscience, bookyear1887
