202 
localities are so adjacent that I have placed the species from 
both of them together. An asterisk has been attached to 
those which are found in South Australian waters, so that 
at a glance the proportion of species common to the two 
regions can be noted. 
Of the 150 shells identified in this list, 108 are found in 
South Australia. Of the 12 shells not named, 4 are almost 
certainly found there, and possibly three others, or 112 pro- 
bably, and 115 possibly among 162; that is, 71 per cent. 
These are, of course, the most common shells, and if the same 
ratio holds with the rare species, nearly three-fourths of the 
marine mollusca will be common to the two far distant locali- 
ties. The proportion of 71 per cent. applies to the Pelecypods 
and to the Gasteropods alike. 
*Spirula spirula, Linne, 1758, Nautilus. 
Cadulus occiduus, Verco, 1912. 
Cryptoplax, sp. 
Patella neglecta, Gray, 1827. 
*Nacella parva, Angas, 1878. 
*Acmea alticostata, Angas, 1865, Patella. 
*Acmea septiformis, 1834, Patelloidea. 
*Acmea crucis, Tenison-lVoods, 1877. 
*Acmea polyactina, Verco, 1912. 
Acmea patella-vecta, Verco, 1912. 
*Haliotis roel, Gray, 1827. 
*Megatebennus omicron, Crosse and Fischer, 1864, 
Fissurella. 
*Macroschisma tasmanie, Sowerby, 1866. 
*Gena nigra, Quoy and Gaimard, 1834, Stomatella. 
*Turbo jourdani, Azener, 1839. 
*Turbo stamineus, Martyn, 1784, Limax. 
Turbo pulcher, eeve, 1842. 
Turbo ticaonicus, Reeve, 1842. 
*Astralium fimbriatum, Lamarck, 1822, Trochus. 
Astralium stellare, Gmelin. 
*Phasianella australis, Gmelin. 
*Phasianella ventricosa, Quoy and Gaivmard, 1834. 
*Phasianella variegata, Lamarck, 1822. 
*Phasianella rosea, Angas, 1867, Eutropia. 
Phasianella, sp. 
*Cyclostrema tatei, dngas, 1878. 
Trochus obeliscus, Gmelin. 
*Clanculus plebeius, Philippi, 1846, Trochus. 
*Monodonta melanloma, Menke, 1843. 
Monodonta (Chlorodiloma) zeus, Yischer, 1874, Trochus. 
*Cantharidus lehmanni, Menke, 1843, Trochus. 
