30 GASTEROPODA. 



quadrate. White, closely variegated all over with purple. Length, 

 '65 ; breadth, '2 ; angle of spire, 18. 

 Great Barrier Island. 



123. T. (Eglisia) Symetrica, sp. nov. "Whorls rounded, with 

 three equal and equally distant spiral ribs ; sutures deep ; mouth 

 roundish. White. Length, '67 ; breadth, '22 ; angle of spire, 23. 



Stewart's Island. 



FAMILY- 



Shell sub-spiral, irregularly twisted, cylindrical, entire, attached by 

 the outer surface ; foot small, folded on itself; operculum single or 

 wanting. 



SIPHONIUM. 



Operculum large, smooth, circular, concave ; scar central, circular, 

 rugose. 



124. S. lamellpsum, sp. nov. Shell thick, irregularly twisted, 

 with numerous imbricating transverse ridges, which are often reflexed ; 

 mouth round, operculum hemispherical. White, sometimes tinged 

 with pale violet. Diameter of mouth, '2. 



Forms large masses not attached to other bodies. 



VERMETUS. 



Operculum large, rather concave ; whorls many, with a thin pro- 

 duced external edge ; scar central, circular, with close regular con- 

 centric grooves. 



125. V. carinifems, ra i? /, Die/. N.Z., ii,p. 242. Shell thick, 

 irregularly twisted, with a high compressed wavy keel along the upper 

 edge ; mouth orbicular, with a tooth above it formed by the keel ; 

 operculum orbicular, horny. White ; interior bluish. 



CLADOPODA. 



Operculum none ; foot elongate, front end simple, hinder extremity 

 oblong, clavate or sub-truncate ; shell irregularly twisted. 



12G. C. zealandica, Qoy, I.e., iii., p. 293. Shell Avhite or 

 brownish, lightly longitudinally striated. Animal, with the head 

 blackish with red spots ; margin pale yellow ; foot spotted with red. 



* 127. C. l"O3ea, Q"-oy, l.c , iii., p. 300. Shell small, spirally 

 extended, cylindrical, rugose, pink. (Quoy.) 



FAMILY SILIQUAKIID^. 



Like Vermetidce, but the mantle and shell with a longitudinal slit ; 

 operculum inany-whorled. 



SILIQUARIA. 



Operculum fringed ; foot end truncate, circular ; shell glassy 

 internally. 



Mediterranean. Australia. 



