. West American shells; a description in familiar terms of the principal marine, fresh water and land mollusks of the United States found west of the Rocky Mountains, including those of British Columbia and Alaska ... reatly with its ageand condition. Specimens have been found aslarge as six-inch globes, but such giants are notcommon. They are ordinarily the size of averageapples. The color is yellowish-white and theform spheroidal; the surface is nearly smooth,and the umbilicus is large. Polynices {Neverita)recluzidna, Petit, thesouthern Moon-shell, Fig-ure 248. This species isa southern form
. West American shells; a description in familiar terms of the principal marine, fresh water and land mollusks of the United States found west of the Rocky Mountains, including those of British Columbia and Alaska ... reatly with its ageand condition. Specimens have been found aslarge as six-inch globes, but such giants are notcommon. They are ordinarily the size of averageapples. The color is yellowish-white and theform spheroidal; the surface is nearly smooth,and the umbilicus is large. Polynices {Neverita)recluzidna, Petit, thesouthern Moon-shell, Fig-ure 248. This species isa southern form, moresmooth and less globularthan the last, and is easilyidentified by the thick,heavy patch of enamel which extends down thecolumella, and nearly or quite fills the shell is very solid and strong. In color itvaries between brown and white. Its averagelength is perhaps two inches, though many speci-mens are smaller. The large operculum is thinand horn-like, without any trace of solid shell. Ndfica dciusa, Brod. and Sby., the Closed Natica,is found in British Columbia and northern watersgenerally. It resembles Figure 247, but is easilydistinguished by its closed umbilicus and its Fig. 24S
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmollusks, bookyear190
