. Bulletin of the Buffalo Society of Natural Sciences. Natural history -- New York (State); Natural history. 278 surfaces variously ornamented. Aperture sub-quadrate to sub-orbicular, the inner lip thin. The outer lip bears a nar- row, deep fissure, or sinus, which is the still unclosed con- tinuation of a revolving band. Pleurotomaria lucina. Hall. (Fig. 207.) (Pal. N. Y., Vol. Pt. II., p. 67, PI. XVIII.) Distinguishing Characters.— Large size; sub-globose, or obliquely ovoid conical form; moderately elevated spire, with minute apex, and about four volutions; regularly and r a p i d 1 y e
. Bulletin of the Buffalo Society of Natural Sciences. Natural history -- New York (State); Natural history. 278 surfaces variously ornamented. Aperture sub-quadrate to sub-orbicular, the inner lip thin. The outer lip bears a nar- row, deep fissure, or sinus, which is the still unclosed con- tinuation of a revolving band. Pleurotomaria lucina. Hall. (Fig. 207.) (Pal. N. Y., Vol. Pt. II., p. 67, PI. XVIII.) Distinguishing Characters.— Large size; sub-globose, or obliquely ovoid conical form; moderately elevated spire, with minute apex, and about four volutions; regularly and r a p i d 1 y expanding bod v-whorl; expanded, nearly round, apertures, with shallow notch; neatly defined, sliuhtlv canaliculate su- ture; moderately wide revolving band, limited by revolving ridges on either side; revolving stria', cancellated by concentric stria? of similar strength. Found in the Encrinal limestone, at Section 5 ( verv rare I. Pleurotomaria lucina, var. perfasciata, Hall, is dis- tinguished by its coarser fasciculate stria? on the body-whorl, which give the shell a nodose appearance. Found in the middle Pleurodictyum bed, in Averv's Ravine (one specimen ). Pleurotomaria itys. Hall. (Fig. 208.) (Pal. X. Vol. Pt. II., p. 76, PI. XX.) s&tk. Distinguishing Characters.— Turbi- nate form, with ascending spire, higher than wide; four or five volutions, grad- ually expanding to the ventricose body- whorl ; broadly oval aperture, some- what higher than wide; strong revolv- er BaST ing stria-, crossed and cancellated by Fig. 207. Pleurotomaria lucina. View of a per- fect specimen from the Onondatra limestone of Clarence Hollow : the specimens f r >m the Hamilton group are commonly much distorted (after Hall;.. 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 Buffalo Society of Natural Sciences.
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