128 ruRPURiN^. 



Sub-gen. polytkopa, Swainson. 



Spire acuminate, whorls foliated or tuberculose ; inner lip 



flattened ; canal small, oblique ; aperture narrowed at the fore 

 part. 



analoga, Forbes. ostrina, Gould. 



attenuata, Reeve. rugosa. Lam. 



crispata, Chem. scobina, Quoij. 



decemcostata, Midd. septentrionalis. Reeve. 



emarginata, Desk. squamosa, Lam. 



Freycinetii, Desk. succincta. Lam. 



fuscata, Forbes. textilosa. Lam. 



lapillus, Linn. Wahlbergi, Krauss. 

 nux, Reeve. 



Sub-gen. cronia, H. and A. Adams. 



Shell ovate; spire acuminated; aperture moderate; inner lip 

 callous at the upper part; columella straight, simple anteriorly. 



amygdala, Kien. 



Genus lOPAS, H. and A. Adams. 



Shell ovate, rugose, last whorl large ; spire acuminate ; 

 aperture moderate, emarginate and channelled in front; 

 inner lip covered with a thin enamel, and with a promi- 

 nent plait-like callosity at the hind part; columella 

 rounded, subtruncate anteriorly ; outer lip sinuous, crenate 

 internally. 



Ex. I. sertum, Lamarck, pi. 13, fig. 4. Operculum, 

 I. sertum, fig. 4, a. 



This genus resembles Pkama among the Muricid(C, 



