Vietnam shells

[conchylinet]

Hello,
Can somebody help in identifying the species below? I think they are common but I dont have any reference about seashells from Vietnam.

<img src="http://www.conchylinet.com/Images/Misc/4585.JPG" alt="http://www.conchylinet.com/Images/Misc/4585.JPG" style="border:0" />
40 mm (Turritellidae?)

<img src="http://www.conchylinet.com/Images/Misc/4586.JPG" alt="http://www.conchylinet.com/Images/Misc/4586.JPG" style="border:0" />
44mm (Phalium sp?)

<img src="http://www.conchylinet.com/Images/Misc/4587.JPG" alt="http://www.conchylinet.com/Images/Misc/4587.JPG" style="border:0" />
40mm

<img src="http://www.conchylinet.com/Images/Misc/4588.JPG" alt="http://www.conchylinet.com/Images/Misc/4588.JPG" style="border:0" />
37mm

Thanks.

Conchylinet

[paul monfils]

1. Could possibly be a piece of a Turritella or a turrid, but I lean toward Faunus ater (family Thiaridae)

2. Phalium (Semicassis) bisulcatum, probably form persimilis

3. Bursa (Bufonaria) rana

4. Meretrix lusoria (family Veneridae)

[conchylinet]

Thanks Paul,
#1 is quite solid/heavy shelled. But I agree it could be not a Turritellidae or Turrid.