370 DE. ST. GEOEGB MIVAKT ON THE SKELETON OF [May 7, 



Above this is an oblique groove {og) running preaxiad and ventrad 

 to below the lateral concave surface before noticed. From the 

 inferior margin of the postaxial surface of the prosopium four 

 processes depend. Two of these {mp) may be called median 

 processes, and each is long and sharply pointed and projects 



Posterior aspect of prosopium of Psittacus erithacus. 



dp. Doi'sal process. 



Ip. Lacbrynial process. 

 nip. Median processes, 

 mr. Median ridge. 



og. Oblique grooTe. 



plf. Fossa for reception of pala- 

 tine. 

 pn. Posterior prosopial nares. 

 sp. Lateral processes. 



rig. 5. 



Posterior aspect of prosopium of Lorius Jlavopalliaiics. 



Ip. Lachrymal process. 

 mp. Median processes. 

 mr. Median ridge. 



og. Oblique groove. 



p. Dorsal process. 



plf. Fossa for reception of pala- 

 tine. 

 pn. Posterior prosopial nares. 

 sp>. Lateral processes. 



ventrad on each side of the median ascending ridge. The other 

 two, lateral or side processes (s^j), are much shorter and 

 depend one from each of the two oblique grooves {og) before 

 described. The two inner margins of the two posterior prosopial 

 nares are formed by the lateral margins of the median osseous 



