MOLLUSCA. 
393 
Harpa rosea .— The Roseate Harfa. 
. Plate LXXXIV. fig. 16. 
Oblong ovate,, flesh-coloured, with roseate interrupted bands ; 
ribs remote; columella of a fine rosy hue. Two inches long. 
Inhabits the Indian ocean. 
Genus 17. — CONCHOLEPAS.— Lamarck. 
Generic Character. — Shell ovate, inflated, semispiral; apex 
inclined obliquely towards the left lip; aperture very wide, lon¬ 
gitudinal, oblique, provided with a notch beneath; right lip with 
two teeth at its base; aperture furnished with an oblong, thin, 
horny operculum. 
Concholepas Peruvianus. — The Peruvian Concholepas. 
Plate LXXXIV. fig. 17. 
Three inches long, and very thick, an umber-brown back, 
and white inside. Inhabits the coasts of Peru. 
Genus 18.—MONOCEROS.— Lamarck. 
Generic Character. — Shell ovate; aperture longitudinal; 
emarginate at the base; a conical tooth at the base of the right 
lip. 
Monoceros cingulatum .— The Banded Monoceros. 
Plate LXXXIV. fig. 18. 
Cylindrical; volutions flattened on their upper edges; with 
transverse spiral brown bands. Inhabits the coast of Malabar. 
Genus 19.—P URP URA.— Lamarck. 
Generic Character .—Shell ovate, smooth, tubular, or angular; 
aperture dilated, emarginate at the base, having a subcaniculate 
oblique sinus; columella depressed, ending belo\v in a point. 
Purpura Persica. — The Persian Purpura. 
Plate LXXXIV. fig. 19. 
Transversely sulcate, and striated between the ridges; dark- 
burnt umber-brown; ridges cream-yellow, with distant spots of 
very dark umber-brown ; upper ridge and the superior edges of 
the volutions mucronate; inside sulcatedand striated. Inhabits 
the Isle of France. 
