Information om | Engelska ordet PROTRACTIVE

Exempel på hur man kan använda PROTRACTIVE i en mening

• In front of the fasciole is an undulated rounded ridge from which extend obliquely protractive obscure riblets more or less obsolete on the body whorl, probably stronger and more distinct on the spire when not eroded.
• The axial sculpture consists of (on the body whorl, about fifteen) protractive short riblets with subequal or slightly shorter interspaces apparently confined to the periphery: these are crossed by t\ro strong spiral threads, the posterior largest and forming oblong tumid nodules at the intersections.
• The axial sculpture, beside incremental lines, consists of twelve low, rounded, strong, slightly protractive ribs with subequal interspaces, strongest just in front of the fasciole, and, on the body whorl becoming obsolete on the base.
• As the shell grows the anterior beaded cordon becomes situated more near the centre of the exposed whorl and (on the fourth whorl about twenty) the nodulations represent the posterior terminations of narrow very protractive axial riblets, which on the fifth whorl fade out on the base.
• These ribs have a decided protractive slant on the early whorls, while on the middle turns they are vertical, and on the later volutions they have a decidedly retractive slant.
• They are marked by sublamellar, protractive axial ribs, which extend undiminished to the summit of the whorls, rendering this crenulated.
• The sculpture consists of blunt, slightly protractive axial ribs, about seven visible from an angle, and fine somewhat irregular spiral lirations which are slightly more crowded on the subsutural slope and slightly coarser on the columella.
• The axial ribs are rather strongly elevated, rounded, somewhat undulatory and slightly protractive, 12 to 14 in number on the later whorls, persisting with undiminished strength to the anterior suture but quite abruptly evanescent posteriorly at the margin of the fasciole.

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