3 shells from Mauritius (indopacific)

[conchylinet]

Hello,
Any help is welcome with these shells from Mauritius (south-west Indian Ocean).

<img src="http://www.conchylinet.com/Images/Misc/5634.JPG" alt="http://www.conchylinet.com/Images/Misc/5634.JPG" style="border:0" />
13.5 mm

<img src="http://www.conchylinet.com/Images/Misc/5636.JPG" alt="http://www.conchylinet.com/Images/Misc/5636.JPG" style="border:0" />
49 mm

<img src="http://www.conchylinet.com/Images/Misc/5638.JPG" alt="http://www.conchylinet.com/Images/Misc/5638.JPG" style="border:0" />
Very light Tellinid (not T.palatum), 31 mm

Thanks,
Pierre