SPERM WHALES 



hardly called articular surfaces." The prezygapophyses 

 are smooth-surfaced. 



The heads for the articulation of the ribs are 

 highly characteristic of the Sperm whale, and differ 

 in detail from those of other whales. The first 

 vertebra bears a strong transverse process of the 

 neural arch for the articulation of the first rib, and 



FIG. 25. SKULL OF SAME FROM THE SIDE. 



(From Flower.) 



/, Parietal, so, Supra-occipital, pi, Palatine, pin, Pre-maxillary. 

 s/i, 6/1, th, Hyoid. f, Jugal. Other letters as in Fig. 24. 



also a small facet on the hinder edge of the centrum, 

 where articulates the head of the second rib. The 

 eight following vertebrae have similar processes, 

 arisino- from their neural arches, for the articulation 



d> 



of the tubercula of their respective ribs. But the 

 corresponding articular facets upon the centra for 

 the capitula of the ribs are not arranged in so 

 uniform a fashion, but vary as follows : The first four 

 vertebrae have facets upon their centra posteriorly 



