82 TRACHELIPODA. 



Buccinum undatum. — The Waved Buccintjm. Plate 

 XI. fig. 14. Ovato-conical, ventricose ; obliquely waved; 

 grooved and striated transversely, longitudinally striulate ; 

 covered with a yellow olivaceous epidermis ; volutions con- 

 vex; aperture white or yellow. Four inches long.* Inhabits 

 the European seas. 



Genus \5.—T>0\ul\]M.—B'ArgenviUe. 



Generic Character — Shell thin, ventricose, inflated ; fre- 

 quently subglobose, very rarely oblong; transversely ribbed; 

 outer lip dentated or crenated; aperture longitudinal, emar- 

 ginate at the base. 



Dolium Perdix. — The Partridge Dolium. Plate XI. 

 fig. 15. Ovato-oblong, thin, reddish-brown, clouded and 

 spotted with white; thickly ribbed and convex; spire short. 

 Four inches long. Inhabits the Tropical seas. 



Genus 16 — HARPA Lamarck. 



Generic Character. — Shell ovate, more or less turgid ; 

 with longitudinal, parallel, compressed, inclined ribs ; spire 

 short; aperture longitudinal, emarginate below; no canal; 

 columella smooth, flattened, and acute at the base. 



Karpa rosea. — The Roseate Harpa. Plate XI. 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 columellar lip; aperture 

 very wide, longitudinal, oblique, provided with a notch be- 

 neath ; outer lip with two teeth at its base ; aperture fur- 

 nished with an oblong, thin, horny operculum. 



Concholepas Peruvianus.—TRE Peruvian Concholepas. 

 Plate XL fig. 17' Three inches long, and very thick, with 



