TRACPIELIPODA. 91 



Turritella Terehra. — The Auger Turritella. Plate 



XII. fig. 11. Greatly turreted, with acute, spiral striae; 



yellowish-brown or whitish ; apex usually reddish. Two 

 inches long. Inhabits the European seas. 



GenMs38.— PHASIANELLA.— Z«ma;cy^. 



Generic Character. — Shell ovate or conical, solid; aper- 

 ture entire; longitudinally ovate; the lips disunited above; 

 the outer sharp-edged, but not reflected; columella smooth, 

 compressed, and attenuated at the base ; aperture provided 

 with a calcareous or horny operculum. 



Mr. Swainson has pointed out a highly distinctive character in the 

 shells of this genus, namely, that of a sMghtly projecting or saUent 

 angle, running along the columella. 



Phasianella Pullus. — The Chicken Phasianella. 

 Plate XII. fig. 12. Smooth, glossy; volutions inflated; 

 skin-coloured, with spots of crimson or rich reddish-brown. 

 One quarter of an inch long. Inhabits the coasts of 

 Britain. 



This species however is not characteristic, and has even heen referred 

 to a difierent genus. The finest s]3ecies helong to New Holland. 



Ge/a<s39.— PLANAXIS Lamarck. 



Generic Character Shell ovate or conic, solid ; aperture 



ovate, or somewhat elongated ; columella depressed and 



truncated at the base, separated from the outer lip by a 



compressed sinus ; lip interiorly sulcated, having a callosity 



running under the superior portion. 



Somewhat alUed to the genus Phasianella, but distinguished by the 

 base of the columella being truncated as in the genus Melauopsis. 



Planaxis sulcata. — The Furrowed Planaxis. Plate 

 XII. fig. 16. Imperforate, transversely furrowed; grayish- 

 white, and spotted with black, forming oblique longitudinal 

 fasciae ; outer lip internally crenulated and striated. One 

 inch long. Inhabits the American seas. 



