36 



Genns Natica, Lamarck. 



Xerita m t pk rtta, Donovan. 

 In deep water ; rare. 



Family BucciNiD^, Cuv. 



Genus Buccinum, Auct. 



B. undatum, Auct. 



In deep water ; common. 



Genus Trichotropis, Broderip & Sowerby. 



T. acuminata (N. S.) 



Of this new and beautiful species, I took between 30 and 40 speci- 

 mens by the dredge in a particular spot in Oban Bay. It is perfectly 

 distinct from T. Borealis, 



Genus Purpura, Lam. 



P. Lapillus, Lam. 

 On the rocks below high water mark ; common. 



Genus Fusus, Lam. 



F. Antiquus, Lam. 



In deep water ; not uncommon. 

 F. laminosus. 



Murex Bamffius, Mont. 



With the last ; not uncommon. 

 F. muricatus, Flem, 



With the last; rare. 

 F, Turricula, Flem. 



With the last; rare. 

 F. rufus, Flem. 



With the last ; rare. 



All the above species are furnished with opercula. 



