330 



RTSSOIDifl. 



fragilis, Mich. 

 granosa, Mich. 

 hyalina, Desvi. 

 inconspicua, Alder. 

 infrequens, C. B. Adams. 

 Janus, C B. Adams. 

 labiosa, Mont. 

 laevigata, C. B. Adams. 

 lilacina, Reclus. 

 lineolata, Mich. 

 monodonta, Phil. 

 multicostata, C. B. Adams. 

 oblonga, Desw,. 

 parva, Da Costa. 

 pigmeea, Mich. • 



pinnae, Krauss. 

 pulchella, Phil. 

 punctulum, Phil. 

 radiata, Phil. 

 rufa, Phil. 

 rufilabris, Leach. 

 scalaris, Mich. 

 solidula, Phil. 

 striosa, C. B. Adams. 

 stricta, Mke. 

 variabilis, Miihlf. 

 ventricosa, Desm. 

 venusta, Phil. 

 violacea, Desm. 

 vitrea, Phil. 



Sub-gen. acme, Hartman (Zippora, Leach). 



Shell aciculate, smooth or longitudinally ribbed, whorls very 

 numerous ; aperture oval, entire ; peritreme widely reflexed. 



acicula, Sow. 

 auriscalpium, Linn. 



Drummondii, Leach. 



Genus ALVANIA, Risso. 



Operculigerous lobe winged on each side, usually with 

 three caudal cirrhi. 



Operculum simple, subspiral. 



Shell ovate-acute, somewhat turbiniform ; spire short, 

 whorls rounded, usually cancellated ; aperture subcircular, 

 often crenate internally j outer lip with a marginal 

 varix. 



8yn. Persephona, Leach. Cyclostrema, Flem., not 

 Marryatt. Turbona, Leach. 



