. East coast marine shells; descriptions of shore mollusks together with many living below tide mark, from Maine to Texas inclusive, especially Florida . Fig. 46 GENUS MEIOCERAS Carpenter 1858 MEIOCERAS NITIDUM Stimpson. Shell minute, shining, whitish or pale brown; swollen in center, contracted near aperture; plug con- vexly rounded; aperture concave. Length mm. PI. 54, Fig. 9 Tampa, Florida to West Indies; Palm Beach, Florida; Newport, Rhode Island Family Trichotropidae GENUS TRICHOTROPIS Broderip and Sowerby 18S9 Shell thin, keeled, umbilicated; epidermis horny, extending like hairs at
. East coast marine shells; descriptions of shore mollusks together with many living below tide mark, from Maine to Texas inclusive, especially Florida . Fig. 46 GENUS MEIOCERAS Carpenter 1858 MEIOCERAS NITIDUM Stimpson. Shell minute, shining, whitish or pale brown; swollen in center, contracted near aperture; plug con- vexly rounded; aperture concave. Length mm. PI. 54, Fig. 9 Tampa, Florida to West Indies; Palm Beach, Florida; Newport, Rhode Island Family Trichotropidae GENUS TRICHOTROPIS Broderip and Sowerby 18S9 Shell thin, keeled, umbilicated; epidermis horny, extending like hairs at an- gles of shell; operculum horny. TRICHOTROPIS BOREALIS COSTELLATUS Couthouy. Whorls four, suture deeply channelled; sev- eral rounded ribs or keels; timbilicated. Length about 18 mm. Epidermis shown in Fig. 2. Damaged specimens are often taken in the stomachs of fish. Depth 7-60 fathoms. PI, 55, Fig. 15 Labrador to Massachusetts Bay Family Planaxidae Shell imperforate, spirally sul- cate; epidermis thick; spire sharp; oval aperture notched below; border of columel- la with a ridge of tubercle above; opercu- lum oval, paucispiral, nucleus almost termi- nal. GENUS PLANAXIS Lamarck 1822 (FLAT AXIS) PLANAXIS LINEATUS Da Costa. Shell small, solid, whorls a little convex; sculptured with well-separated spiral grooves, most conspicuous upon the upper portion of spire and at base; outer lip heavy and slightly deflected above; notch below rounded; color yellowish or whitish with revolving brown or whitish bands, sometimes entirely yellow. Length 7 mm. This little shell is beautifully variable in color ornamentation. The ground color ranges from white to almost black and the lines are often absent from the final whorl.
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Photo credit: © The Bookworm Collection / Alamy / Afripics
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Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjectmollusks
