334 



DK. ST. GEOKGE MIVAET ON THE SKELETON OF [Apr. 2, 



processes are relatively longer and more slender, notably that of 

 the fourth true rib. 



The fifth thoracic rib is more slender, and is very slender in 

 L. fiavopattiatus, in which it bears no imcinate process. It may 

 bear a small and simple one in P. erithacus. 



The sixth thoracic or first fioating rib is longer than the fifth 

 true rib, and still more slender, and is more or less anchylosed to 

 the sacrum. 



No seventh thoracic or second fioating rib is developed in 

 L. fiuvopalliatus, but may be present in P. erithacus. Then it is 

 long, very slender, and anchyloses with the sacrum. 



The Sternal Ribs. 



There are five sternal ribs (figs. 12 & 14, pp. 324, 326) on each side 

 which articulate dorsally with the respective apices of the thoracic 

 ribs and ventrally with the sternum. The last three are expanded 

 dorso-ventrally at theii- proximal ends. They are expanded trans- 

 Tersely at their distal ends ; each presenting there a surface some- 



Fig. 20. 



m 



ca 



-I 



P 



Ventral aspect of sternum of Lorius flavopalliatus. 



ca. Costal angle. 



do. Defect of ossification. 



h. Muscular impression. 



i. Intermuscular ridge. 



k. Keel. 



m. Manubrium. 



p. Lateral angle. 



