59 



Shell thick, irregularly twisted, opake, white, with a high compressed wavy keel along 

 the upper edge ; mouth orbicular, with a tooth above et formed by the keel. — Operculum 

 orbicular, horny. 



New Zealand. 



20. Siphonium (Stoa) politum Daudin. 



Spiroglyphus politus Daudin Recueil 1801 p. 49. 



an Stoa perforans M. de Serres Ann. sc. nat. 1855 p. 241 t. 8 fig. 3- 

 T. irregulariter spiralis, politus ; apertura rotundata. 

 Diam. de 3 lignes au plus. 



Patria: Australia. 



Subgenus Vermetus Adanson. 



Vermetus Adanson Senegal 1757. 



Campulotus Guettard Proc. zool. soc. 1774 Mem. III p. 94. 



Bivonia Gray Proc. zool. soc. 1847 p. 156. 



— Adams Gen. 

 Petaloconchus Lea Trans. Amer. Phil. soc. 1843 p. 299. 



— Woodward Man. p. 462. 



— Carpenter Cat. p. 308. 



— — Proc. Zool. soc. 1856 p. 713. 

 AI et es — Cat. p. 301. 

 Vermetes Mörch Proc. Zool. soc. 1861 p. 334. 



— Paetel Catalog p. 493. 



— Kobelt Prodr. p. 308. 



T. affixa, irregulariter spiraliter torta, nunquam turritelloidea, plerumque decussata, 

 columella lira mediana elevata, saepe laminis duabus spiralibus varie dispositis. 



Operculum tenue, flavum, concavum, parum spirale. 



Animal viviparum, dorso utrinque carinato, tentaculis breviusculis, filamentis pedalibus 

 longis contractilibus. 



8* 



