80 
ANATOMY AND PHYSIOLOGY 
to form its articulating portions with the base of the 
cranium. These branches become thin, but broad ; they 
are rounded on their outsides, but are hollowed like a 
shell on their internal aspects, like the same parts in the 
porpoise. These branches are 1 foot 11 inches in their 
widest or perpendicular parts, and are 6 feet 5 inches in 
length from the posterior formation of the symphysis. 
Their articulating surfaces, or condyles, stand in a per- 
pendicular direction, and are 11 inches long and 7 \ 
inches wide. 
OF THE SPINAL COLUMN® 
The spinal column, consisting of forty-four vertebrae, 
forms nearly a straight line throughout the whole of its 
extent, except a slight concavity in the dorsal region for 
the reception of the viscera of the chest. The bones are 
articulated by their bodies only ; they have no posterior 
articulating surfaces,— -in this specimen they are separate, 
and not anchylosed. 
OF THE CERVICAL VERTEBRAE. 
These are only two in number, the atlas and dentata : 
they resemble the human very much in form, except 
that the second has no odontoid process. The atlas is 
in width 3 feet 4 inches ; in depth, 1 foot 7 \ inches ; 
in thickness, 6| inches. The dentata is in width 2 feet 
10| inches; in height, 1 foot 11| inches; in thickness, 
9 \ inches. This bone has a thick, but short spinous 
process. 
