. The Echo . Figure 1. Generalized muricid radular dentition - 2/3 of a transverse tooth-row. Family Columbariidae. The members of this small, homogeneous group, numbering perhaps 15 to 20 species of worldwide distribution are readily distinguished from members of other muricacean families. The shell is relatively small and proportionally very elongate. Much of this length consists of an exaggerated, narrowly open, siphonal canal (Figure 2). The protoconch, according to Clench (19^^), consists of two bulbous, smooth whorls; the post- nuclear whorls are generally strongly carinated, with or wit
. The Echo . Figure 1. Generalized muricid radular dentition - 2/3 of a transverse tooth-row. Family Columbariidae. The members of this small, homogeneous group, numbering perhaps 15 to 20 species of worldwide distribution are readily distinguished from members of other muricacean families. The shell is relatively small and proportionally very elongate. Much of this length consists of an exaggerated, narrowly open, siphonal canal (Figure 2). The protoconch, according to Clench (19^^), consists of two bulbous, smooth whorls; the post- nuclear whorls are generally strongly carinated, with or without spinose projections. In most species a prominent spiral groove on the lower portion of the body whorl terminates in a moderately 55
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Keywords: ., bookcollectionbiodiversity, bookcontributor, booksubjectmollusks
