330 



DK. ST. GEOEGE MITAUT OS THE SKELETON OF [Apr. 2, 



is more slender than its serial predecessor. The fossa between it 

 and that of the third lumbo-sacral vertebra is smaller than those 

 between the transverse processes of the preceding vertebrae, but 

 the difference is not so great in L. jiavopalliatiis as in P. erithacus. 

 The centrum is again shghtly wider than that of its preceding 

 vertebra. 



The ventral surface of the lumbo-sacral vertebrae is somewhat 

 keeled, ridge-Uke, in L. JfavopalUaUis, but not so in P. erithacus (en). 



Fig. 19. 



■ff 



cn 



Ventral aspect of sacrum of Fsittacws erithacus. 



cn. Fused sacral vertebrae. 

 il. Ilium. 

 is. Ischium. 

 If. jjateral fossa. 



Is. Hio-caudal spine. 

 j)t, Parapophysial process, 

 'pii. Pubis. 



