Dear all, I need a bit more help. I just received a few tiny Philine shells in the mail. They are unidentified and tiny (perhaps 2-3 mm). They come from Washington state, USA. They are chalky white with microscopic horizontal grooves running over them. I need an expert who can accurately identify these things, as they are tricky. They are too complex to describe much over e-mail; I would appreciate if I could send them snail-mail for ID. Thanks, James