Dear Francois, Kris and all,
It seems I was having trouble with the dratted machine!! Hopefully now fixed.
I think there were 3 species (as follows);
The first is I think Holothuria dakarensis (though possibly H. tubulosa as Panning described dakarensis as a subspecies of tubulosa. I did discuss this in my 1969 paper, but knowledge has moved on somewhat in the intervening years!) The second species looks like Holothuria (Platyperona) sanctori as suggested by Chantal. The third species may rather be Holothuria mammata (rather than a stichopodid). These are only suggestions, in the absence of any further help e.g. spicule images)
A possible (old) help might be Panning's 1939 paper 'Holothurien von den Kanaren und von Dakar. Vidensk. Meddr. dansk naturh. Foren. 103:523-546, figs 1-11'
a) hope this is of use; b) hope it gets through!!
Best regards,

From: flmnh-aspidolist [mailto:[log in to unmask]] On Behalf Of François Michonneau
Sent: 05 March 2014 15:51
To: [log in to unmask]
Subject: Fwd: Trans. : holothurians of the Dakar area

Hello all,

  I received these cuke pictures taken from Dakar, Sénégal by a French naturalist who is getting worried about Chinese prospectors who want to harvest them. I'm not familiar with the fauna, but maybe some of you are. Do you have any IDs?

  -- François