iv. 1 



CETACEA. 



:>o 



and very wide, oblong wing-like transverse processes directed 

 somewhat backwards, and with an oval perforation near the 



[7. — Anterior surface of axis of common Fin Whale {Balcenoptera musculus), 

 o odontoid process. 



,se. The other cervical vertebra? (Fig. 18) have similar 

 broad, very short bodies, small arches, without spines, and 

 very long transverse processes, composed of a slender upper 



Fig. 18. — Anterior surface of fourth cervical vertebra of the same animal, ^5. az ante- 

 rior of zygapophysis ; t upper transverse process ; f lower transverse process. 



and lower bar, widely separated at their bases, but united at 

 their extremities so as to enclose a very large space between 

 them. In the seventh the upper process only exists, and the 

 lower one is occasionally imperfect in the sixth. 1 In very 

 young animals these processes are formed only of cartilage • 



Professor Turner has shown that, in a fatal Balcenoptera sibbaldii, 

 the inferior transverse process of the seventh is present in a cartilagi- 

 nous condition. {Journal of Anatomy and Physiology, May 1871 .) 



^hJL 





