104 Walter Stcqdey : Cervical Ribn in Man. 



Summary. 



The maiiunalian neck was evolved to co-ordinate its movements with 

 those of the fore-limbs during elevated quadrupedal progression. 

 Elevated quadrupedal progression caused the mammalian to become 

 the most fixed type amongst necks. The mammalian neck remains 

 fixed to type so long as the functions which compel its evolutions 

 remain constant. The mammalian neck remains true to type after its 

 functions have been abandoned until such times as it becomes assailed 

 by hostile impulses. Cervical ribs in the mammalian neck express 

 the breaking down of fixed mammalian neck-type. 



Literature. 



Keen, Cervical Ribs. American Journal of Medical Sciences, Feb , 



1907. 

 Owen, Comparative Anatomy asd Physiology of Vertebrates, 1866. 

 Erasmus Wilson, The anatomist's vade-mecum, bS-lu. 

 Felix Oswald, Sudden Origin of New Tj^pes. Science Progress. 

 Chaveau's Comparative Anatomy. 

 Sisson, Veterinary Anatomy, 1910. 



Wiedersheim and Parker, Comparative Anatonjy of Vertebratea 

 Cabot, Differential Diagnosis. 

 Thomson, Outlines of Zoology, 5th edition. 

 Morris, Treatise of Anatomy, 4th edition. 

 International Text-Book of Surgery. 

 Spencer and Cask, Practical Surgery, 1910. 

 Keibal and Mall, Manual of Human Embryology. 

 Keen's Surgery. 



Holt, Diseases <jf Infancy and Childhood. 

 Davis, Applied Anatomy, 1910. 



