VERTEBRAL COLUMN 



61 



processes (zygapophyses) are present on the neural arches. 1 The 

 cervical region is usually the most movable, and the rcnlm 

 may hen; possess articulations and have a,n opisthoccelous form 



FIG. 49. Archtcopteryx lithorjraj)hica. From the Solenhofen slates (Jurassic). 

 After Dames, from the specimen in the Berlin Museum. 



c, carpus; d, clavicle; co, coracoid; h, humerus; r, radius; .sr, scapula; u, ulna' 

 / ///, digits of manus; / IV, digits of pes. 



(Ungulata). In some cases, on the other hand, the cervical 

 vertebra may become firmly fused with one another (e.g. Dasypus, 

 Talpa, Cetacea). 



1 In certain Edentata (e.gr. Myrmecophaga, Dasypus) extra articular processes 

 are present besides the ordinary zygapophyses on the posterior thoracic and 

 lumbar vertebra-. 



