The Conchologist's First Book / A System of Testaceous Malacology, Arranged Expressly for the Use of Schools, in Which the Animals, According to Cuvier, Are Given With the Shells, a Great Number of New Species Added, and the Whole Brought Up, as Accurately as Possible, to the Present Condition of the Science.

by Edgar Allan Poe; Thomas Brown

Animal. See Scalaria.

Shell. Thick, and pearly in the interior, subdiscoid or conical; spiral whorls rough or angular, often detached, spiny; large umbilicus, sometimes triangular; the margins united, mostly fringed or ventricose. Inhabits the Indian and American seas. Five living species. Seven fossil.

• Delphinula laciniata.
• D. turbinopsis.
• D. distorta.
• D. rugosa.
• · · · · ·
• D. laxa.*

FAMILY XVI.
Turbinacea. Eight genera.

1. Genus Solarium. Pl. [XI].

Animal. Unknown.

Shell. Orbicular, depressed, umbilicus large and conical, crenulated or dentated on the inner margin of the whorls; aperture not modified by the last whorl of the spire, which is entirely flat; no columella. Inhabits the Indian seas. Seven living species. E. fossil.

• Solarium granulatum.
• S. perspectivum.
• S. hybridum.
• S. lævigatum.
• S. stramineum.
• S. variegatum.
• S. luteum.

2. Genus Trochus. Pl. [XI].

Animal. Spiral, having the sides of the body often ornamented with digitated or lobed appendages, and provided with a short foot, rounded at its two extremities; head provided with two tentacula more or less elongated, having the eyes upon a dilation of their external base; mouth without superior tooth, but furnished with a spiral lingual band.