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 ; J n. s. 

 Dalei. 



Humphreysianum. 

 fusiforme. 



207 208 



FAMILY IV. MURICID^E. 



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.). Spindle-shell. Shell spindle- 

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

 culum ovate, curved. 



F. antiquus. F. Norvegicus. 



Berniciensis. propinquus. 



Islandicus. Fig. 206 ; %n.s. Turtoni. 



Trophon (Montfort). As Fusus, but the canal 

 short and oblique. 



T. Barvicensis. 



clathratus. Fig. 207 ; n. s. 

 muricatus. 



