Any ideas?

[lulu.shell]

Hello again!

My classification antics are on-going, and I am slowly reducing the  content of my unknown shells box. Here are some more unknown shells:

1. From Vietnam, purchased with Meretrix lyrata from a local supermarket frozen food counter:
<img src="http://1.bp.blogspot.com/_PHbVtVT661c/TGLAvRpTdxI/AAAAAAAAAPg/m4Wka6-cJ_s/s400/DSCF1067.JPG" alt="http://1.bp.blogspot.com/_PHbVtVT661c/TGLAvRpTdxI/AAAAAAAAAPg/m4Wka6-cJ_s/s400/DSCF1067.JPG" style="border:0" />  

2. Unknown small conus:
<img src="http://1.bp.blogspot.com/_PHbVtVT661c/TGLAGvX6s-I/AAAAAAAAAPQ/VfQD7Z_IG7A/s400/DSCF1065.JPG" alt="http://1.bp.blogspot.com/_PHbVtVT661c/TGLAGvX6s-I/AAAAAAAAAPQ/VfQD7Z_IG7A/s400/DSCF1065.JPG" style="border:0" />
<img src="http://2.bp.blogspot.com/_PHbVtVT661c/TGK_1lQPuaI/AAAAAAAAAPI/taHS6Hmoeqw/s400/DSCF1064.JPG" alt="http://2.bp.blogspot.com/_PHbVtVT661c/TGK_1lQPuaI/AAAAAAAAAPI/taHS6Hmoeqw/s400/DSCF1064.JPG" style="border:0" />

3. Unknown:
<img src="http://1.bp.blogspot.com/_PHbVtVT661c/TGK_lAiAzKI/AAAAAAAAAPA/ncV7SiRGeZY/s400/DSCF1063.JPG" alt="http://1.bp.blogspot.com/_PHbVtVT661c/TGK_lAiAzKI/AAAAAAAAAPA/ncV7SiRGeZY/s400/DSCF1063.JPG" style="border:0" />
<img src="http://3.bp.blogspot.com/_PHbVtVT661c/TGK-6RqV-4I/AAAAAAAAAO4/vvT_B7Z70bU/s400/DSCF1062.JPG" alt="http://3.bp.blogspot.com/_PHbVtVT661c/TGK-6RqV-4I/AAAAAAAAAO4/vvT_B7Z70bU/s400/DSCF1062.JPG" style="border:0" />

I am grateful for any help, as always.