VERTEBRAE OF ANTEATERS 



163 



The first of tliese characters is the series of additional 

 zygapophyses on the posterior dorsal and lumbar vertebrae ; 

 these are very clear in the Auteaters and Armadillos ; less clear, 

 but still obviously represented, in the Sloths. In the second 

 place, they all possess a clavicle, rudimentary, it is true, in the 



Fid. 89. — Great Anteater {M ijrmccophaga jubata). A, Side view ol' twelltli ami tliirteeiilh 

 thoracic vertebrae. B, Posterior surface of second lumbar vertebra. C, Anterior 

 .surface of third lumbar vertelira. x |. az, Anterior zygapojihy.sis ; a-}, az^, ccS'. 

 additional autei'ior articular facets ; cc, facet for capitulum of ril) ; m, nieta- 

 pophysis ; pz, posterior zygapophysis ; 2>~^, P^'^ P^\ additional posterior articular 

 facets ; t, transverse process ; tc, facet for articulation of tubercle of rib. (From 

 Flower'.s Osteology.) 



Great Ant-bear, but still present. Thirdly, the testes are 

 abdominal throughout life, a character which they share with 

 such lowly -organised animals as the Monotremata and the 

 Whales. Finally, and this is by no means a matter to lie over- 

 looked, not only are all the existing members of this group 

 American in range, but there is no evidence to prove that they 

 have ever existed elsewhere. No European or Old- World repre- 



