250 Lamarck's Genera of Shells. 



posed in a line parallel to, and near the left lip ; the last hole 

 incomplete, forming only a notch. No operculum. 

 Type. Haliolis Iris *. (Idem. Gmel.) 



Shell rounded-oblong, very large, thiii, rugose-plicate, pret- 

 tily varied with green, red, and blue ; spire sub-prominent, ob- 

 tuse; left lip elevated. New Zealand. PI. VIII. Fig. 158. — 

 15 Species. 



8th Family, 

 Plicacea t- (2 Genera.) 



Aperture of the shell not dilated ; columella plaited. 



All sea shells, distinct from the Auriculie, which are land 

 shells, by their general form and projecting spire ; and from 

 the Volutse, Mitrae, <§c., by having no notch at the base of the 

 aperture. 



1. TORNATELLA J. 



Shell convolute, ovate-cylindrical, generally striated trans- 

 versely ; no epidermis. Aperture oblong, entire ; right lip acute ; 

 one or more plaits, usually thick and obtuse, on the columella. 

 Spire prominent. 



Type. Tornatellafiammea\, (Voluta flammea. Linn.) 

 Shell oval, ventricose, transversely striated, white, with red, 

 wavy, longitudinal markings; spire conoidal, columella with 

 one fold. PI. VIII. Fig. 159.— 6 Species. 



2. Pyramidella ||. 

 Shell turrited, no epidermis. Aperture entire, semi-oval; 

 outer lip acute. Columella straight, projecting at the base, 

 subperforate ; three transverse folds on the columella 

 Type. Pyrmidella dolabrata II. (Trochus dolabratus. Linn.) 

 Shell conico-turrited, perforate, smooth, white, with sur- 

 rounding yellowish lines ; columella recurved ; interior of the 

 lip toothed, and sulcated. South America. PI. VIII. Fig. 160. 

 5 Species. 



* A rainbow. 2d species. — Lamarck's type is H. midce. 

 f From plico, to fold. i From torrto, to turn in a lathe. 



i Y'eUnw, orjiame colour. \\ From pyramis, a pyramid. 



. li Cut with an axe. Vd Species — Lamarck's type is P. lerebellum. 



