Osteological Symmetry of the Camel. 529 
and perhaps the defective ossification on the right side of the 
3rd and 4th over the nerval canal, show the tendency to exert 
the muscles of the right side more than those of the left. 
Dorsal Vertebra. 
The labours of the animal have much altered the form of the 
bodies of the dorsal vertebre. 
The sternal length from the 3rd to the 10th inclusively 
appears to be the sixth part of the basilar length of the head. 
In this dimension, the sternal length, the 1st dorsal vertebra 
corresponds with the 11th ; as does the 2nd with the 12th. 
The greatest elevation of the spine is at the 3rd dorsal ver- 
tebra; the extreme length of that bone equalling the greatest 
extent of the pelvis towards the mesial plane. 
The spinal lengths, rostrad and caudad from the 3rd dorsal 
vertebra, diminish irregularly ; but so that the spinal length of 
the 7th dorsal vertebra is the same as that of the 1st. 
The spinal length of the 12th and last dorsal vertebra is equal 
to the length of the 1st rib, and to the greatest breadth of the 
head. 
The spinal epiphyses that form the nucleus of the hump, are 
nearly steatomatous in the Ist, 2nd, 3rd, and 4th dorsal ver- 
tebrz ; as also in the 9th and 10th. In the other dorsal verte- 
bre the epiphyses are externally osseous. 
From the 1st dorsal vertebra to the 10th, the — — 
the margins of the roots of the spinous processes diminishes a 
third. In the same interval, the distance between the extremi- 
ties of the transverse processes diminishes a fourth. 
The natural breadth of the bodies of the dorsal vertebra seems 
to be not greater than the wideness of the nostrils: but, owing 
to the great weights borne by the animal, the enlargement is 
. such that these bones are an instance of exostosis rather than 
3r9 of 
