30 



ME. ST. GEOEGE MIVAET ON THE 



THE DOESAL VEETEBR^. 



These vertebrae, the twentieth to the twenty-fourth inclusive, closely resemble the 

 dorsal vertebrae of Bromceus ; but it is only the first which has a hypapophysis, and 

 that is single and median. 



THE DOKSO-LUMBAR YERTEBTLE. 



These vertebrae, #^e twenty-Jlfth and twenty-sixth {the twenty-fifth, -sixth, and -seventh 

 in C. australis). so closely resemble the corresponding vertebras of Bromwus that the 

 minute difl'erences may be disregarded. The last dorso-lumbar vertebra becomes 

 ankylosed to the pelvis. 



THE LUMBAR VERTEBRA. 



The twenty-seventh vertebra (the twenty-sixth of C. lemiettii and the twenty-eighth of 

 C. australis) is part of the pelvic mass, and the first vertebra which has no conspicuous 

 rib. It is still less concave ventrally than is its homologue in Drommus ; and its trans- 

 verse process is still less directed preaxially. 



The next four vertebrae, the twenty-eighth to the thirty-first inclusive, seem quite to 

 resemble the corresponding ones of Bromceus, except that they are less concave 

 ventrally. 



The thirty-second and thirty-third vertebrae differ from those of DromcBus in that 

 their transverse processes do not blend together so early. 



The thirty- fourtli, -fifth, and -sixth vertebrae are devoid of transverse processes, and 

 have them represented only by minute rudiments. They are the lumbo-sacral vertebrae. 



PELVIS OF CASSOWAEY (i natural size). 

 Fig. 26. 

 il at 



Ventral aspect. Letters as in fig. 18, p. 23. 



