about a half inch or so in length. The coloration is a tan/brown base with 3 lighter yellowish/white stripes on the shell, with a thin white strip near the mantle. This white stripe has 3 brown dots in it, in line with the stripes on the upper part of the shell. I acquired 3 of them in my bag of nassarius snails, and although they are indeed not, they have very similar behavioral triats(burrown in the sand, emerging when tank is fed). They also appear to share a similar feeding structure, so I am assuming they are related to the nassarius. Any help in this identification would be greatly appreciated. 
