Osteological Symmetry of the Camel. 527 



from the muzzle to the upper margin of the occipital fora- 

 men, are in the proportion 



1. 2. 3. 

 The common difference of the palatal, the coronal, the basi- 

 lar, and the extreme lengths of the cranium, is the breadth of 

 the cranium at the temporal fossee : these lengths in the animal 

 examined being respectively 



12. 15. 18. 21 inches: 

 The chief measurements of the coronal breadth of the head 

 are in consecutive proportion as the numbers 



3. 2. 4. 5: 

 Those on the level of the zigomatic arch are also in consecutive 

 proportion nearly as the numbers 



8. 9. 8. 4: 

 While the chief measurements of breadth on the level of the 

 palate are consecutively as the numbers 



3. 4. 7. 



Of the Vertebra. — Cervical Vertebra. 



In the accompanying Tables, the dimensions of the bones of 

 the neck are very minutely stated. This minuteness will be 

 deemed the less superfluous, if it be considered that these bones, 

 from their remarkable size, may be viewed as an enlarged re- 

 presentation of the type of the similar bones of the human body 

 and in other mammalia. 



The dimensions of the atlas and of the second vertebra of the 

 neck are, on account of their great importance, given apart ; 

 and an endeavour has been made to trace the correspondence 

 of their dimensions with the dimensions of the other cervical 

 vertebrae. 



The lateral extent of the atlas is equal to the distance 

 between the inner margins of the orbits. The atlas, besides 



VOL. XVI. 3 Y its 



