78 
ANATOMY AND PHYSIOLOGY 
height of the chest, from the spinous processes of the 
dorsal vertebrae to the lower portion of the sternum, 
8 feet 2 inches ; extreme length of the chest from the 
first to the last rib, 7 feet 4 inches ; depth of the in- 
terior of the chest, posteriorly from the inferior portion 
of the body of the last dorsal vertebra to the posterior 
and superior portion of the sternum, 5 feet 8 inches ; 
depth of chest, anteriorly from the inferior portion of the 
atlas to the superior and anterior portion of the sternum, 
2 feet 9 inches. 
OF THE CRANIUM. 
The gigantic skull of this animal forms more than a 
third of the whole length of the skeleton ; it is wedge™ 
shaped, and begins with a very thin edge anteriorly, and 
rises gradually in height, forming an angle on its upper 
surface, until it arrives at the posterior fourth ; it then 
rises suddenly and forms a thin outward wall, which 
encloses a large crater-looking cavity, fitted for the re- 
ception of an immense mass of the junk, which, with the 
case, forms the whole upper portion of the head in the 
living animal. 
The extreme length of the cranium in this specimen 
is 18 feet and § an inch, and its extreme breadth at 
its mala portions, 8 feet 4 inches ; extreme width at the 
centre of its wedge-shaped portion, 5 feet 10 inches ; ex- 
treme height at its occipital portion, 5 feet 6| inches ; 
the width of its condyloid occipital process is 2 feet 
If inches ; depth of the same, 1 foot inches. 
Under the floor of the crater-like cavity, the thin walls 
