. Bulletin - New York State Museum. Science. Platyceras paxilHfer nodosum Conrad and P. subnodosum Hall, which usually appear in the form of nodate casts. In the Onondaga limestone fauna are P. dumosum, echi- natum, multispinosum, fornicatum but among them all is none of the type expressed in P. p a x i 11 i f e r . Lower Devonic. Grande Greve, P. Q, Platyceras guesnini nov. Shell of medium size, suberect, subsymmetrically coiled; apex deeply coiled in horizontal plane, rapid expansion beginning at one and one half volutions, body whorl irregularly expanded, sub- circular in cross-section, dir
. Bulletin - New York State Museum. Science. Platyceras paxilHfer nodosum Conrad and P. subnodosum Hall, which usually appear in the form of nodate casts. In the Onondaga limestone fauna are P. dumosum, echi- natum, multispinosum, fornicatum but among them all is none of the type expressed in P. p a x i 11 i f e r . Lower Devonic. Grande Greve, P. Q, Platyceras guesnini nov. Shell of medium size, suberect, subsymmetrically coiled; apex deeply coiled in horizontal plane, rapid expansion beginning at one and one half volutions, body whorl irregularly expanded, sub- circular in cross-section, direct and unattached for one half its. Platyceras guesnini length. Surface without revolving furrows and ridges, and marked with subequidistant concentric undulating fringes gradually be- coming obsolete near the aperture; also traversed longitudinally by very fine revolving lines. Loiver Devonic. Perce rock, P. 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
