Three of the following pairs of the human skeletal parts are correctly matched with their respective inclusive skeletal category and one pair is not matched. Identify the non-matching pair.

Clavicle and glenoid cavity are found in pectoral girdle. Each half of pectoral girdle consists of a clavicle and a scapula. Glenoid cavity is a depression below the acromion (the expanded process of scapula). The glenoid cavity articulates with the head of the humenes to form the shoulder joint.