Possible Clues:

• Spine-to-pelvis connectors
• Bones discovered in west side of Californian capital
• Neighbors of 7-Down
• Spinal bases
• Bones that form the human pelvic arch
• Pelvis connectors
• There's a scar where they're down at the back
• Bones: principal ingredients of stock as cook regularly avers
• They have to be bony at the back over the bottom
• Vertebral bones