vertebrata in being articulated with the vertebral column. This
difference does not exist in fishes. It consist in the rabbit of four
bones; the ilium (i.), the ischium (is.), the pubis (pb.), and the small
cotyloid bone-- the first two and the latter one meeting in the
acetabular fossa (ac.) in which the head of the femur works. The
pubes and ischia are fused along the mid-ventral line. Many
morphologists regard, the ilium as equivalent to, that is, strictly
corresponding in its relation, to the scapula, the pubis to the
cartilaginous substratum of the clavicle, and the ischium to the
coracoid.