2. Serpula. The Worm Shell. Twenty-six species.

The name of this genus is derived from the Latin word serpo, to creep,

on account of the vermiform character of some of its species.

They are invariably tubular, sometimes solitary, but more frequently in

clusters spirally entwined, adhering to marine substances. In colour

they are brown, purple, yellow, tawny, pink or white, and sometimes

tinged with green.

Tube solid, calcareous, irregularly twisted, fixed to other substances.

Serpula vermicularis.

S. fascicularis.

S. intestinum.

S. contortuplicata.

S. plicaria.

S. glomerata.

S. decussata.

S. protensa.

S. infundibulum.

S. annulata.

S. cereolus.

S. filograna.

S. vermicella.

S. filaria.

S. pellucida.

S. intorta.

S. cristata.

S. spirulæa.

S. quadrangularis.

S. minima.

S. echinata.

S. sulcata.

S. costalis.

S. dentifera.

S. sipho.

S. arenaria.

_S. vermicularis._ The wormlike Serpula.

White, cylindrical, tapering, rugged, variously curved and twisted.

A Manual of Conchology According to the System Laid Down by Lamarck, with the Late Improvements by De Blainville. Exemplified and Arranged for the Use of Students. · 第 23 / 258 题