Is this character one that is Genesis based ? If so you may have a problem, becvaue afaik Genesis body is basically made from one mesh. THe older generation figures, such as the Gen 4 ones, V4 and M4 have separate meshes for the different parts of the body, and you can select the mesh for that part and actually delete it in Bryce.
Edit OK, just checked. Serpenta is V4 based. I am not sure how the meshes is labelled when you export from DS to Bryce, but in poser the meshes from the hip downwards need selecting and deleting. With my Poser exports I have 4 meshes I believe, legs, feet, toes and toenails.