Another image from today:
Vertigo sp. I am pretty sure I have specimens of V. modesta modesta in my samples, but here I'm not sure. I can make out two lamellae, but the others are either covered by sand, or indistict. Anyway, I think this is my second favorite snail from my collection (after Discus). By the by, that's Abe Lincoln's nose on the left.
I suppose I could talk about where V. modesta lives now and what that says about the climate in the Pleistocene, but I'll just say that it was colder. I think that's a fair bet. Once I get my assemblage data, perhaps I can talk about things in more detail.