40 MOLLUSCA. TRACHELIPODA. 



F. tulipa, Lam. Shell subfusiform, smooth, ventricose, whitish, and 



marked with purplish brown ; whorls convex and the margin of 



the suture fimbriated ; aperture striated within, and the pillar 



two-plaited. 6 inches long. American seas Bonan. fig. 187. 



This shell varies much in its colourings. 



F. trapezium, Lam. Shell fusiform, ventricose, obtusely angulated, 

 and the whorls highly nodulous ; aperture toothed, and the beak 

 rather short and straight ; lip striated within ; colour brownish 

 white or yellowish brown, with transverse black lines in pairs. 4 

 to 6 inches long. Inhabits Indian seas Lister, pi. 931, fig. 26. 



Gen. 33. CANCELLARIA, Lam. Volute^ Murex, Lin. 

 Shell oval or turreted ; aperture subcanaliculated at the base ; 

 canal very short, or almost none; columella plicated, the 

 folds varying in number, but generally transverse ; lip fur- 

 rowed within. 



C. reticulata, Lam. Shell oval, ventricose, thick, transversely ru- 

 gose, reticulated with oblique longitudinal striae, and zoned with 

 yellow and red ; whorls convex ; columella smooth above and 

 with three folds below ; aperture white. 2 inches long. Inha- 

 bits Atlantic Ocean. Bonan. 3, fig. 52. 



C. senticosa, Lam. Shell turreted, longitudinally ribbed, and can- 

 collated with transverse acute striae ; pillar lip obliquely plaited ; 

 brownish yellow or white, with darker transverse bands. 1^ inch 

 long. Inhabits Indian seas. Bonan. 3, fig. 35. 

 Of this genus many fossil species exist. 



Gen. 34. TURBLNELLA, Lam. Voluta, Mureoo, Lin. 

 Shell turbinated or subfusiform, canaliculated at the base, and 

 the columella with from three to five compressed and trans- 

 verse folds. 



The greater part of the Turbinellas were included by Linnaeus in his genus Va- 

 luta, the others he ranged among the Murices. The canal at the base of the open- 

 ing distinguishes them from the first, and the want of varices or ridges from the se- 

 cond. The animal is furnished with a small suborbicular and horny operculum, 

 and two obtuse club-shaped tentacula. The eyes are at the exterior base of these 

 tentacula, and the mantle is terminated by a tubular prolongation. 



T. pyrum,Liam. (Valuta, Lin.) Shell ventricose above, pear-shaped, 

 ftilvous white, with reddish spots ; spire small, mucronate ; apex 

 mammillated ; beak long, striated ; columella with four folds. 3 

 inches long. Inhabits Indian seas. Lister, pi. 816, fig. 26, 27 

 This shell is prettily spotted in young individuals, the spire is slightly nodu- 

 lous, and it feels particularly heavy for its size. 



T. Ceramica, Lin. Shell fusiform, transversely sulcated, muricated 

 with tubercles, and variegated with white and black ; the last 

 whorl with long echinated tubercles posteriorly ; the middle and 

 base with simple wings ; spire conical ; columella with five plaits, 

 no umbilicus. 3 inches long. Indian seas Bonan. 3, fig. 286. 



T. polygona, Lam. Shell fusiform, subpolygonal, longitudinally 



