#1 Of the 3 meninges that line the brain/spinal cord, probably the one that is most commonly recognized, at least it was to me <img src="/images/graemlins/smile.gif" alt="" /> was the dura mater - which is the outside lining; the lining closest to the inside is the pia mater; which leaves the middle lining: arachnoid ... oops... I can't read my own writing, I'm not sure about the ending of that word. It just reminded me of a spider. <img src="/images/graemlins/wink.gif" alt="" />
#2 Part of a hip joint - there are really only two - ball and socket, right?
#3 The bone near the collarbone is the scapula, since I think of the collarbone as the clavicle, and this was a lot harder to research. Thanks for the challenging questions! <img src="/images/graemlins/smile.gif" alt="" />