130 GASTROPODA. 



Buccinum (Linn.). Whelk. Shell few-whorled, 

 swelling ; spire moderate ; aperture large ; canal 

 short, turned outwards ; operculum plaited. Animal 

 with a broad foot, obtusely pointed behind. 



B. undatum. Fig. 205 ; ^n.s. 

 Dalei, 



Humphreysianum. 

 fiisiforme. 



206 207 20S 



Family IV. Muricid^. 



Shell spiral ; outer lip entire behind ; front pro- 

 longed into a straight canal. Animal with a broad 

 foot ; eyes seated on the tentacles, without stalks ; 

 tongue as in the last Family. 



Fusus (Lamk.). SpindU-sJiell. Shell spindle- 

 shaped ; spire many-whorled ; canal long ; oper- 

 culum ovate, curved. 



