. Mollusca ... Mollusks. PLECTOPYLIS. 147 obsolete at the side, but reappeariug in tlie umbilical region. The spire is a little raised, the suture linear. Tliere are seven regularly coiled whorls, which increase slowly and gradually, and are flattened above and tumid below. The last whorl is tri- carinated, one keel being at the periphery, one above, and another below (in young shells these Iceels are provided with a fringe of coarse hairs) ; this whorl widens suddenly at the aperture, where it is deeply deflected. The aperture is almost horizontal, elliptic cordate ; the peristome white, thic
. Mollusca ... Mollusks. PLECTOPYLIS. 147 obsolete at the side, but reappeariug in tlie umbilical region. The spire is a little raised, the suture linear. Tliere are seven regularly coiled whorls, which increase slowly and gradually, and are flattened above and tumid below. The last whorl is tri- carinated, one keel being at the periphery, one above, and another below (in young shells these Iceels are provided with a fringe of coarse hairs) ; this whorl widens suddenly at the aperture, where it is deeply deflected. The aperture is almost horizontal, elliptic cordate ; the peristome white, thickened, and strongly reflected ; the margins united by a raised flexuous ridge, slightly notched above and below at the junctions. The parietal armature is very. 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 Blanford, William Thomas, 1832-1905; Godwin-Austen, Henry Haversham, 1834-1923; Gude, Gerard Kalshoven, 1858-; Preston, Hugh Berthon, 1871-. London, Taylor and Francis; [etc. , etc. ]
Size: 1670px × 1496px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorg, bookcentury1900, bookdecade1900, booksubjectmollusks
