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.

by Thomas Wyatt

CLASS I.
ANNELIDES.
CONTAINS FOUR FAMILIES.

FAMILY I.
Dorsaliæ. Two genera.

1. Arenicola. Has no shell. One species.

A. piscatorium.

2. Siliquaria. Four species.

Shell very thin, conical, tubular, involuted in a loose and irregular spiral manner; aperture circular, edges sharp, interrupted in the middle by a notch prolonged like a slit through nearly all its length, stopped abruptly at some distance from the summit.

Siliquaria anguina.

S. muricata.

S. lævigata.

S. lactea.