In _B. bairdii_ the anterior border of the scapula is narrower than in
_B. arnuxii_, the anterior ridge coming close to it and lying parallel
with it. The acromion is directed more upward, so that the angle between
it and the body of the scapula is more acute, and the process itself is
rather more expanded distally. The coronoid is inclined a little more
downward. The whole surface of the scapula is very uneven. (Pl. 33, fig.
2.)