Osteological Symmetry of the Camel. 531 
The Tail. 
The dimensions of the bones of the tail, relatively to the other 
bones of the body, are perhaps more curious than interesting. 
The sum of their lengths is equal to the greatest spinal extent 
in the dorsal vertebrae, namely, to that of the 3rd dorsal ver- 
tebra. 
The sum of their transverse breadths is equal to the greatest 
transverse extent in the lumbar vertebrze, namely, to that of the 
5th lumbar vertebra. 
The sum of the breadths at their oblique processes equals the 
sum of their spinous heights: and both are equal to the greatest 
transverse aperture of the pelvis. - 
The sum of their rostral thicknesses is twice the caudal height 
of the head: and the tip of the tail may be compared with the 
aperture of the auditory canal. 
Of the Ribs. 
The longest of the twelve ribs are the 7th and the 8th. The 
length of each of these equals the length of the spine of the sca- 
pula, being the greatest extent of that bone. 
The decrements of length in the other ribs, rostrad from the 
7th, and caudad from the 8th, are such, that 
The 6th rib corresponds with the 10th, 
ne Sih... . — < Mith the ii. 
II SUE —. . . . with the 120. 
The sum of the lengths of the titelve ribs i is about ten times that 
of the longest rib. | 
At the sternal end of the ribs the breadth is greatest. The 
broadest are the 4th and the 5th; their breadth equals that of 
the cranium at the temporal fosse. 
The sum of the breadths of the ribs at their sternal ends is 
eight 
