520 



ZOOLOGY 



SECT. 



the Proboscidea it is conical. In the Euminants the cervical verte- 

 brae present a median keel below, produced in the posterior part of 



PMx 



ExQ 



FIG. 1164. Section of skull of Manatee (Manatus senegalensis). Letters as in Fig. 1162. In 

 addition, ET. ethmo-turbinal ; Ty. tympanic. (After Flower.) 



FIG. 1165. Axis of Bed Deer (Cervus elaphus). A, lateral view; B, dorsal view, en 

 epiphysis of centrum ; od. odontoid process ; pt. z. post-zygapophysis ; sp. neural spine ; 

 trans, transverse process. 



the region into a process. The development of the cervical neural 

 spines varies : in most they are elongated and compressed ; but in 



