TRACHELIPODA. 71 



Harpa rosea. — The Roseate Harpa. Plate XL fig. IG. 



Oblong ovate, flesh-coloured, \Aath roseate interrupted bands ; 



ribs remote ; columella of a fine rosy hue. Two inches long. 

 Inhabits the Indian ocean. 



Genus 17.- CO'NCHOLEP AS.— Lamarck. 



Generic Characler. — 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 PeruviarMs. — The Peruvian Concholepas. 

 Plate XI. fig. 17. Three inches long, and very thick, with an 

 umber-brown back, and white inside. Inhabits the coasts of 

 Peru. 



Genus 18.— MONO CER OS.— Zamarc;^. 



Generic Characler. — Shell ovate; aperture longitudinal; 

 emarginate at the base ; a conical tooth at the base of the right 

 lip. 



Monoceros cingulatum. — The Banded Monoceros. Plate 

 X I. fig. 1 8. Cylindrical ; volutions flattened on their upper 

 edges ; with transverse spiral brown bands. Inhabits the coast 

 of Malabar. 



Genus 19.— FURPU RA.^ Lamarck. 



Generic Character. — Shell ovate, smooth, tubular, or angular ; 

 aperture dilated, emarginate at the base, having a subcaniculate 

 oblique sinus ; columella depressed, ending below in a point. 



Purpura Persica. — The Persian Purpura. Plate XI. 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 sulcated and striated. Inhabits 

 the Isle of France. 



