A Monograph of the Terrestrial Mollusca Inhabiting the United States. With Illustrations of All the Species
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Oregon.
3. Polymita areolata, Sowerby.
Plate 6, figure 5.
Globose-conic, thin, striate ; spire depressed-conoidal; whorls 5, a little convex, the last slightly descending towards the aperture, large, inflated ; aperture rounded lunate, lip thicken- ed within, columellar margin sometimes somewhat dentate, nearly covering the narrow umbilicus; base convex. Cream- color, ornamented with revolving series of interrupted brown lines, light brownish or reddish within.
Diam. 26, height 18 mill.
Oregon,... California.
69 ] 4. Polymita redemita, Wm. G. Binney.
Plate 6, figure 7.
Globose-conic, rather thin, wrinkled, closely and minutely granulate ; spire elevated, oljtuse, suture impressed ; whorls 6, convex, last quite large and rounded, depressed towards the aperture; aperture rather large, very oblique, lip reddish ash-color, thickened, ends approaching, entirely covering the umbilicus. Brown, banded with chestnut above the middle.
Diam. 21, height 12 mill.
California.
Dr. Newcomb considers this a variety of Nickliniana, but it appears to me that it is distinguished by its closed umbilicus, as well as by texture and color.
What to read after A Monograph of the Terrestrial Mollusca Inhabiting the United States. With Illustrations of All the Species?
You can find similar books in the "Read Also" column, or choose other free books by George Washington Tryon to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Oregon.
3. Polymita areolata, Sowerby.
Plate 6, figure 5.
Globose-conic, thin, striate ; spire depressed-conoidal; whorls 5, a little convex, the last slightly descending towards the aperture, large, inflated ; aperture rounded lunate, lip thicken- ed within, columellar margin sometimes somewhat dentate, nearly covering the narrow umbilicus; base convex. Cream- color, ornamented with revolving series of interrupted brown lines, light brownish or reddish within.
Diam. 26, height 18 mill.
Oregon,... California.
69 ] 4. Polymita redemita, Wm. G. Binney.
Plate 6, figure 7.
Globose-conic, rather thin, wrinkled, closely and minutely granulate ; spire elevated, oljtuse, suture impressed ; whorls 6, convex, last quite large and rounded, depressed towards the aperture; aperture rather large, very oblique, lip reddish ash-color, thickened, ends approaching, entirely covering the umbilicus. Brown, banded with chestnut above the middle.
Diam. 21, height 12 mill.
California.
Dr. Newcomb considers this a variety of Nickliniana, but it appears to me that it is distinguished by its closed umbilicus, as well as by texture and color.
What to read after A Monograph of the Terrestrial Mollusca Inhabiting the United States. With Illustrations of All the Species?
You can find similar books in the "Read Also" column, or choose other free books by George Washington Tryon to read onlineMoreLess
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