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

N. Javanica.

N. cancellata.

N. canrena. The Canrena Natica.

Sub-globular, smooth, umbilicus deep, bordered anteriorly by a kind of callous column; spire a little prominent; exterior fawn coloured, with bands and rays of reddish brown; interior white; operculum calcareous.

N. castanea. The chestnut Natica. Pl. [21], fig. 6.

Species with the umbilicus uncovered, and the operculum horny.

N. mamilla. The nipple Natica.

Species with the umbilicus entirely covered over by a large callosity; the spire papillose, and the operculum horny.

5. Janthina. Two species.

Formerly classed with the Helix, which it somewhat resembles in form, but properly separated, as it differs in every other respect.