Spirolaxis rotulacatharinea (Melvill &
3.5 mm shell diameter.
shell with a flat margin bordered by granular spiral
cords. It is cream, splotched with darker brown.
rotulacatharinea are rare in sand samples
kanaloana beds taken at depths of around
10-20 m (33-66 ft).
It's listed in Severns, 2011 as Spirolaxis rotulacatharinae.
CP: composite photo, same shell; 3.5 mm in diameter:
sand sample from Halimeda
kanaloana bed, Airport Beach, Maui; 1999.