41. Clam shells , scallop shells, mussel shells42. In Squillace's hands, the stable where history says Jesus was born is a giant Ghenghis Khan clam shell . 43. The river was named for mussel and clam shells found along the river and along Shell Lake, its origin. 44. He found fossilized clam shells high above existing sea level and carbon-dated them to about 1, 100 years ago. 45. The AMPAR, upon binding two glutamate molecules, undergoes a conformational change that resembles the opening of a clam shell . 46. The two pieces fit together like a clam shell with the hinge at the rear of the pistol grip. 47. Michelle suggests Ren?be Venus unadorned and lie in a giant clam shell , that is also part of the float. 48. Lockheed will be using the clam shell buildings to keep the wind and rain off of its little launch vehicles. 49. Many will also inhabit empty clam shells , which also serve as nesting sites; males are known to guard the brood. 50. An integrated roll bar terminated the body work and also formed a place for the clam shell doors to seal.