Fusus. MOLLUSCA. 39 



without external ridges ; spire short, sometimes obtuse ; co- 

 lumella smooth ; lip without notch. 



P. carica, Lam. Shell pyriform, with the body whorl ventricose, 

 and armed on the shoulder with large compressed nodules ; aper- 

 ture dilated and the beak very short ; colour yellowish, or dirty 

 white, with grayish bands and irregular transverse stripes. 6 

 inches long. Lister, pi. 880, fig. 3, 6. 



P. ficus, Lam. Shell pyriform, finely decussated, bluish gray, with 

 reddish or violet scattered spots ; transverse striae largest ; spire 

 short, convex. 3 inches long. Inhabits Indian Ocean. Lister, 

 pi. 751, fig. 46, a. 



Two fossil species of this genus have been found in the London clay. 



Gen. 31. Fusus, Lam. Murex, Lin. 



Shell fusiform or subfusiform, canaliculated at the base, ven- 

 tricose in the middle part or inferiorly, without exterior varices, 

 and with the spire produced ; right margin without notch ; 

 columella smooth ; a horny operculum. 



This genus is distinguished by the fusiform or elongated shape of the shells, which 

 are canaliculated at their base, ventricose in the middle or lower part, and without 

 ridges on the spire. The columella is almost never plicated ; the lip is never notched ; 

 and the spire forms an elevated cone. All the Fusi are marine, wrinkled, striated 

 or tuberculated externally, and covered with an epidermis. 



F. coins, Lam. Shell turreted, with a nodulous keel, transverse 

 ribs, and plaited longitudinally j outer lip crenulated, and the 

 beak long and straight. 3 to 9 inches long. Inhabits Indian 

 seas. D'Argenv. pi. 9, fig. B. 



F. antiquus, Lam. Shell oblong, whitish, ventricose, with rounded 

 whorls and slightly decussated striae ; aperture dilated, with a 

 short beak, and the throat yellowish. 4 or 5 inches long. In- 

 habits Northern seas. B. Brown, Illust. pi. 47, fig. 8. 



F. corona, Lam. Shell ovate, with the whorls flat above, and crown- 

 ed with undulated membranaceous scales j beak sulcated ; aper- 

 ture white ; colour yellowish, with two or three broad interrupted 

 brown bands. 2^ inches long. Inhabits Gulf of Mexico. 

 Chemnitz, x. pi. 161. fig. 1526, 1527. 



F. corneus, Lam. Shell oblong, with eight convex whorls, striated 

 transversely and slightly wrinkled longitudinally ; beak rather 

 long, and slightly ascending. 3 inches long. Inhabits Northern 

 seas, ft. Brown's Illust. pi. 47, fig. 7, 9, 11, 12. 



A very great number of fossil species of this genus have been found both on the 

 continent and in this country. The British fossil species are chiefly in the London 

 clay. 



Gen. 32. FASCIOLARIA, Lam. Murex, Lin. 



Shell subfusiform, canaliculated at the base, without varices or 

 ridges, and with two or three very oblique folds on the colu- 

 mella. 



