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Webster 1913 Edition

(spûr′shĕlˊ)

Noun.

(Zool.)

Any one of several species of handsome marine gastropod shells of the genus

Trochus

, or

Imperator

. The shell is conical, with the margin toothed somewhat like the rowel of a spur.

spur-shell ‎(plural spur-shells)

Any of several species of conical gastropod shells in the family Trochidae and genus Astraea in family Turbinidae, the margin of the shells being toothed somewhat like the rowel of a spur.