VASlDuE. 155 



Genus FASTIGIELLA, Reeve. 



Shell elongately turreted, umbilicated, whorls rounded ; 

 aperture small ; canal very short ; columella somewhat 

 twisted. 



Ex. F. carinata, Reeve, pi. 16, fig. 7. 



In some respects this genus resembles TarrUella, but 

 it has a twisted columella ; it also resembles those species 

 of Clavatula with the canal short {Drillia, Gray), but the 

 absence of sinus in the outer lip at once distinguishes it 

 from them. At present, one recent species only is known. 



Fam. VASID.E. 



Teeth on lingual membrane in three series (IT 1), the 

 central recurved, toothed at the tip, the lateral not ver- 

 satile ; central tooth broad, few-toothed ; lateral teeth 

 narrow, strong, Avith a single large denticle. Mantle en- 

 closed, with a straight siphon. 



Operculum ovate, acute, with the nucleus apical. 



Shell more or less turbinate, with plaits on the middle 

 of the pillar. 



This group appears to be intermediate between the 

 " Tulip Shells " and the VoliitidcE, and may be termed 

 False Volutes; the lingual dentition and character of the 

 animal are, however, entirely different from those of Vo- 

 lutld(B. 



Genus vasum, Bolten. 



Shell oval, oblong, solid, tubercular or spinose; spire 

 short; aperture oblong; canal short, somewhat recurved; 



