1865.] MOLLUSCAN FAUNA OF SOUTH AUSTRALIA. 157 
northerly winds, the shells of the female Argonaut are washed on 
shore in considerable numbers at Thistle Island, near the entrance 
of Spencer’s Gulf. Many of these shells contain the animal in a 
living state; but they soon fall a prey to the Seagulls, by whom 
they are greedily devoured. 
Fam. AMMONIID. 
2. AMMONIA LEVIS. 
Lituus levis, Gray, Cat. Moll. Brit. Mus. (Cephalopoda), part 1, 
le 
Hab. Pelagic, throughout the Southern Seas. 
This species, in regard to the shell, appears to resemble very 
strongly that commonly known as the Spiruda peront of Lamarck. 
At Encounter Bay, and on the exposed sandy beaches between 
it and Cape Northumberland, the dead shells are frequently washed 
on shore. 
In the South Pacific Ocean the Spirule exist in great abundance. 
On the smooth black sands along the west coast of New Zealand 
their shells lie scattered in infinite numbers; and after an easterly 
gale they are almost as frequent on many parts of the New South 
Wales coast. 
On one occasion only I had the good fortune to meet with the 
perfect animal enclosing the shell; it was thrown up, after a severe 
storm, on Bondi Beach, near Port Jackson, and it is now preserved 
in alcohol in the Sydney Museum. 
GASTEROPODA. 
Fam. Muricip#. 
3. Murex (PreRoNoTUs) TRIFORMIS, 
Murex triformis, Reeve, Conch. Icon. pl. 13. f. 53. 
M. acanthopterus, var., Sowerby, Conch. Illustr. f. 51. 
Station. On oyster-banks, from 2 to 10 fathoms. 
Hab. Port Lincoln, Spencer’s Gulf. 
This fine species varies considerably both in form and colour; the 
prevailing hue is of a purplish black, but examples sometimes occur 
where the entire shell is of a cream-colour, with the varix of the 
outer lip beautifully laminately frilled. It occurs alsogilt King 
George’s Sound. 
4, Murex SEROTINUS. 
Murex serotinus, A. Adams, Proc. Zool. Soc. 1851, p. 268. 
Station. Amongst rocks, at low water of spring tides. 
Hab. Aldinga Bay, St. Vincent’s Gulf. 
But one specimen was obtained, alive, at the above locality. 
5. Murex SCALARIS. 
Murex scalaris, A. Adams, Proc. Zool. Soe. 18537 i. 
