Madagascar bivalves

[conchylinet]

Hello again,
This time I am in trouble with Madagascar bivalves. They have been recently collected from the Mozambique Channel (West coast near Morondava, an estuarine area). I hope you could help with a few of them if not all.


A: 42mm
<img src="http://www.conchylinet.com/Images/Misc/4026.JPG" alt="http://www.conchylinet.com/Images/Misc/4026.JPG" style="border:0" />

B: 33mm (Donacidae)
<img src="http://www.conchylinet.com/Images/Misc/4028.JPG" alt="http://www.conchylinet.com/Images/Misc/4028.JPG" style="border:0" />

C: 18mm (Donacidae)
<img src="http://www.conchylinet.com/Images/Misc/4029.JPG" alt="http://www.conchylinet.com/Images/Misc/4029.JPG" style="border:0" />

D: 14mm (Donacidae)
<img src="http://www.conchylinet.com/Images/Misc/4030.JPG" alt="http://www.conchylinet.com/Images/Misc/4030.JPG" style="border:0" />

E: 41mm
<img src="http://www.conchylinet.com/Images/Misc/4025.JPG" alt="http://www.conchylinet.com/Images/Misc/4025.JPG" style="border:0" />

Thanks,
Conchylinet.