Fig. 1. 
Fig. 2. 
Fig. 1. 
EXPLANATION OF THE PLATES. 
PLATE XII. 
A VENTRAL view of the Whale, shewing the jaw in its dislocated position; 
the animal lying on its right side. 
A dorsal view of the Whale, shewing the external orifice of the spiracle or 
breathing tube; also the rudimentary dorsal fin. 
» PuLaTeE XIII. 
The lower jaw, seen from the articulation, after having been removed from 
the body. 
The cranium without the lower jaw, seen from the anterior part of the head, 
to shew the basin formed by the bones, for the reception of the enormous 
mass composing the head and throat. 
The width of this basin measured 5 feet, 11 inches. 
The width across the orbits 8 feet, 8 inches. 
The length* from the summit of the cranium to the anterior extremity, 20 feet. 
PuatTe XIV. 
A side view of the cranium without the lower jaw. Shewing the articulating 
surface of the os occipitis, which is received into the concave surface of the 
atlas. 
Horizontal diameter of this articulating surface, including, between the condyles, 
the foramen magnum, 2 feet, 5 inches. 
Horizontal diameter of the foramen magnum, 8 inches. 
Vertical diameter of ditto,...............6: 9 inches. 
This gradually became smaller as it approached the cavity for the brain, when 
it did not exceed 4 inches in diameter. 
Transverse diameter of orbit, (horizontal)... 8 inches. 
* The hypothenuse of a triangle formed by these two points, and the bottom of the basin, 
