pelvis study

I have always found the pelvis one of the most difficult shapes to draw and I always admire artists who can draw it out of their head in any position. As Robert Beverly Hale said, "all lines run over conceived form"-meaning without a thorough understanding of the shape, one cannot draw it. With this in mind, I set up a pelvis for my class to draw, with particular emphasis on understanding of the planes that make up each half (called os innominatum, "the bone with no name", which actually looks like a propeller blade). This is my page of demos: