78 TRACHELIPODA. 



Section II.— Phytiphaga. 



Without a projecting syphon, generally respiring byan orifice; 

 provided with jaws, and usually feed on vegetable substances ; 

 shell having the aperture entire, and destitute of a notch or 

 canal. 



FAMILY I. TURBINACEA. 



Shell turrited, or conical, with an oblong or rounded aperture, 

 not expanding, and the margin disunited. 



Genus 37.— TURRITELLA Lamarck. 



Generic Character. — Shell turrited, not pearly; aperture 

 rounded, entire ; margin disunited above ; the outer lip with a 

 slight sinus, and the aperture furnished with a horny operculum. 

 The genera Scalaria, Turbo and Cerithium, are nearly allied to this genus, 

 but may easily be distinguished from them by a sinus on the right margin of 

 the aperture, which is only visible when the mouth is quite perfect, and 

 which does not exist in any other shells. 



Turritella terehra. — The Augur Turritella. Plate XII. 

 fig. 11. Greatly turrited, with acute, transverse striae; yellow- 

 ish-brovni ; apex usually reddish. Two inches long. Inhabits 

 the European seas. 



Genus 38.— PH A SIANELLA.— XamarcA. 



Generic Character. — Shell ovate or conical, solid; aperture 

 entire, longitudinally ovate ; the outer lip disunited above, 

 sharp-edged, but not reflected ; columella smooth, compressed, 

 and attenuated at the base ; aperture provided with a calcareous 

 or horny operculum. 



Swainson has pointed out a highly distinctive character in the shells of 

 this genus, namely, that of a slightly projecting or salient angle, ruoning 

 along the columella. 



Phasiatiella puUus.— The Childish 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. 



