. Bulletin - New York State Museum. Science. Fig. 133 Pentagonia unisulcata [fig. 132], easily recognized b}^ its peculiar form; A try pa reticularis [fig. 133], generally quite robust; and P e n - tamerella a rat a [fig. 100], a pentameroid shell with strongly arching beak as in Gypidula, but with sinus in the pedicle valve and cor- responding fold in the brachial valve, though these are not always pronounced. Strong bifurcating rounded plications cover all ex- cept the upper part of the beak. Finally among the more com- mon species should be named A m p h i - genia elongata [fig. 134], which
. Bulletin - New York State Museum. Science. Fig. 133 Pentagonia unisulcata [fig. 132], easily recognized b}^ its peculiar form; A try pa reticularis [fig. 133], generally quite robust; and P e n - tamerella a rat a [fig. 100], a pentameroid shell with strongly arching beak as in Gypidula, but with sinus in the pedicle valve and cor- responding fold in the brachial valve, though these are not always pronounced. Strong bifurcating rounded plications cover all ex- cept the upper part of the beak. Finally among the more com- mon species should be named A m p h i - genia elongata [fig. 134], which when full grown is a large, terebratuloid shell not unlike Kensselaeria but proportion- ally wider. The internal characters are pentameroid and the sur- face is covered with fine radiating striae. Among the gastropods the following are com- mon and characteristic: Platyceras dumo- sum [fig. 135], an extremely spinose shell, with the apex enrolled. The form varies from sub- cylindric in the adult to extremely ventrioose. Diaphoros- toma lineatum [fig. 136], a close coiled, nonumbilicate, low-spired shell, with uniformly enlarging suborbicular aperture, and fine spiral striae cancellated by the lines of growth. Euomphalns decewi [fig. 137], a flat coiled shell with the whorls enrolled in nearly the same plane and barely touch- ing, and with a strong carina on the upper part of the last whorl,. 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
