. Bulletin - New York State Museum. Science. SOME NEW DEVONIC FOSSILS 253 considered ontogenetically, they are always distinguishable from those, while on the whole most nearly allied to the later expressions in the Oriskany sandstone. Lower Devonic. Grande Greve, P. Q. Athyris hera nov. The sandstones at Gaspe Basin afford casts of ventral valves, one of them of noteworthy size, of subcircular outline, consider- ably arched at the umbo but depressed on the slopes, and with a narrow deep and evenly rounded median sinus; the surface of the valve bears only the concentric lines of growth and ver
. Bulletin - New York State Museum. Science. SOME NEW DEVONIC FOSSILS 253 considered ontogenetically, they are always distinguishable from those, while on the whole most nearly allied to the later expressions in the Oriskany sandstone. Lower Devonic. Grande Greve, P. Q. Athyris hera nov. The sandstones at Gaspe Basin afford casts of ventral valves, one of them of noteworthy size, of subcircular outline, consider- ably arched at the umbo but depressed on the slopes, and with a narrow deep and evenly rounded median sinus; the surface of the valve bears only the concentric lines of growth and very fine radial striae visible only in the sinus. The valve has a length and width of 45 mm. The larger specimen suggests a Spirifer allied to the rare type of S. 1 a e V i s of the Ithaca (Portage) fauna of New York, though. 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
