994 ON A COLLECTION FROM NORFOLK ISLAND — MOLLUSCA, 



3, Purpura sp. ? 



This species cannot be identified, the specimens being sea- 

 worn. 



4. RiciNULA ricinus, Linn. 



Murex ricinus, Linn. ; Ricinula arachnoides, Lam. 



One single exaaiple of this common Central Pacific species. 



5. Ricinula (Sistrum) aspersa, Lam. 

 Ricinula aspersa, Lam. 



Three specimens in fair condition ; found also in New Caledonia 

 and other Pacific Islands. 



6. Ricinula (Sistrum) chaidea, Duclos. 

 Pui'inira chaidea, Duclos. 



Three specimens very much worn. This species is very common 

 at Lord Howe Island, 450 miles east of Sydney Heads ; it is also 

 found in Port Jackson, in New Caledonia, and in other islands 

 in the North, South, and Western Pacific. 



7. Ricinula (Sistrum) undata, Chem. 



Murex undata, Ghem. ; Murex inargriticola, Broderip; Ricinula 

 iiscelhim, Homb. et Jacq. ; Purp^ira muricina, Blainville. 



Two specimens found, one very fair and slightly sea-worn ; 

 they do not differ from specimens from Central and Western 

 Pacific Islands. 



8. Ricinula (Sistrum) tuberculata, Blainville. 



Piir2)ura tuhercidata, Blainville. 



Of the four specimens to hand one is evidently the variety 

 maryinalha, common on the New South Wales coast. 



9. Laturus sp. ? 



Three sea-worn specimens resembling L. Noumeaensis, from 

 New Caledonia. 



