a | 
2) 
2 first Annual Report 
Epiphragmophora arrosa Gld. 
A few specimens found on the cliffs at Arch Beach. 
Opalia insculpta Cpr. 
Scala hindsii Cpr. 
Only empty shells of these two species were taken, and these were 
inhabited by hermit crabs. 
Littorina planaxis Phil. 
The commonest shell of the beach, found in great numbers adher- 
ing to the rocks from those only wet by spray at high tide down to 
rocks uncovered only at low tide. 
Littorina scutulata Gld. 
Occurring with L. planaxis, but far less common. 
Figure 36. Pomaulax undosus 
Cypraea spadicea Gray 
Rare among the rocks between tides. 
Murex gemma Sby. 
Among the rocks between tides, not common, but the most com- 
mon of the Muricide. 
Purpura nuttallii Con. 
Not common. 
Ocinebra gracillima Stearns 
Acanthina spirata Bly. 
Of the above two species, only shells inhabited by hermit crabs 
were found. 
