last 4 in a school quiz. Cryptic clues to things with partys of body or science. 1 A family Arched (7,7 letters) 2 Hand polisher used by a scrap merchant (7,6) 3 It's one of a pair found in bones (6) 4 IMPULSES REST ON US (anagram of either end of a biological process) Any ideas very welcomed and appreciated. I can then put this one to bed at last.