Any ideas what these snails are?

[lulu.shell]

Hello!

Here are 4 snails: I think the bottom right one is from Britain, but I have no ideas about the rest. Thanks for all your help!

<img src="http://2.bp.blogspot.com/_PHbVtVT661c/TEXLbOky21I/AAAAAAAAAOw/EwXzHk331Rg/s400/P7191784.JPG" alt="http://2.bp.blogspot.com/_PHbVtVT661c/TEXLbOky21I/AAAAAAAAAOw/EwXzHk331Rg/s400/P7191784.JPG" style="border:0" />

<img src="http://4.bp.blogspot.com/_PHbVtVT661c/TEXLVrQyS8I/AAAAAAAAAOo/2vz6VcxApGs/s400/P7191783.JPG" alt="http://4.bp.blogspot.com/_PHbVtVT661c/TEXLVrQyS8I/AAAAAAAAAOo/2vz6VcxApGs/s400/P7191783.JPG" style="border:0" />

[fortuno]

they are gibbula umbelicaris of the trochidae familly

[Emma]

Hello Fortuno,

Thank you for your identification, but I don't think they are umbilicaris because these specimens aren't from the Mediterranean, but thanks for your help!

Lulu.shell=Emma (I lost my old account with the web page change).

[dave r]

Better photos of the individual shells would be very helpful. The middle right one is the British one, Gibbula umbilicalis.