Euthymella regalis (Jousseaume, 1884) ?
L x W: 7.3 x 3.0 mm
70 ft. Underneath coral rubble.
Tanguissan Beach, Guam
28 May 2006
note: initially ID'd as E. elegans, referencing Poppe's Philippine Marine Mollusks, Vol 1, plate 310, fig 5. Have changed to E. regalis as tentative ID. Thanks to Hannco Bakker for pointing this out.