TRACHELIPODA. 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. 



Genus 38.— PHASIANELLA.— ZamarcA. 



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 slightly 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 been refeiTed 

 to a different genus. The finest species belong to New Holland. 



Genus 39.— PL AN AXIS.— Zawiarc^. 



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 allied to the genus Phasianella, but distinguished by the 

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



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. 



