. Bulletin - New York State Museum. Science. GEOLOGY AND PALEONTOLOGY OF THE SCHOHARIE VALLEY 221 ate cardinal line^ and rounded to angular umbonal slope, anterior of which there is a faint oblique depression; G r a m - m y s i a a 1 v e a t a [fig. 172], a large coarse shell with strongly forward-pointing beak, coarse subregular concentric folds which become obsolete on the posterior portion of the shell; P t e r i n e a flabellum [fig. 173], an oblique shell with convex left and. Fig. 179 Spirophyton velum flat right valve, large and well defined wing and strong coarse radiating istriae incr
. Bulletin - New York State Museum. Science. GEOLOGY AND PALEONTOLOGY OF THE SCHOHARIE VALLEY 221 ate cardinal line^ and rounded to angular umbonal slope, anterior of which there is a faint oblique depression; G r a m - m y s i a a 1 v e a t a [fig. 172], a large coarse shell with strongly forward-pointing beak, coarse subregular concentric folds which become obsolete on the posterior portion of the shell; P t e r i n e a flabellum [fig. 173], an oblique shell with convex left and. Fig. 179 Spirophyton velum flat right valve, large and well defined wing and strong coarse radiating istriae increased by repeated intercalations of finer ones. Among the commoner gastropods are: Pleurotomaria c a p i 11 a r i a [fig. 174], a strongly sculptured, high spired spe- cies in which the intersections of the lines of growth and the spirals are spinose; P. sulcomarginata [fig. 175], another sculptured form, in which the upper portion of the whorl is flat, so as to produce a conic spire, with the band on the outer margin. 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
