. Bulletin - New York State Museum. Science. 192 NEW YORK STATE MUSEUM lower side to the stoma. It bears a peripheral elevated or convex band which is bounded above by a sulcus, though not so well de- fined below. The upper shoulder of the whorl is subcarinate while the lower surface is broadly rounded and bears an oblique sulcus on the final third of the volution. Aperture sinuous, projecting above and reentrant in a broad curve below the position of the peripheral band. Surface crossed by fine concentric lines which curve forward on the upper surface of the whorl and make a retral turn on th
. Bulletin - New York State Museum. Science. 192 NEW YORK STATE MUSEUM lower side to the stoma. It bears a peripheral elevated or convex band which is bounded above by a sulcus, though not so well de- fined below. The upper shoulder of the whorl is subcarinate while the lower surface is broadly rounded and bears an oblique sulcus on the final third of the volution. Aperture sinuous, projecting above and reentrant in a broad curve below the position of the peripheral band. Surface crossed by fine concentric lines which curve forward on the upper surface of the whorl and make a retral turn on the periphery whence they again curve forward in a broad sweep, on the lower surface being interrupted by the interior sulcus. Lower Devonic. Grande Greve, P. Q. Trochonema lescarboti nov. Shell moderately large, trochiform. Whorls broadly sulcate above, gently convex peripherally and regularly convex below; three to four in number. Sutures impressed and bounded by an elevated ridge or carina within which the surface is depressed in a broad and shallow sulcus bounded outwardly by a sharp keel. Trochonema lescarboti which lies at the shoulder of the whorl and from which the whorl surface is abruptly depressed. No peripheral band is known though the internal cast bears a peripheral depression. Lower sur- face not known except from the cast, apparently regularly con- vex. Surface marked by regular concentric lines without revolv- ing striae. Loiver Devonic. Perce rock, P. O. Phragmostoma diopetes nov. A small bellerophontid with well developed slit band and ap- parently smooth surface save for regular concentric growth lines. The shell expands rapidly to an explanate mouth which involves. 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 Educatio
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