PSITTAOI 



265 



this paper references will be found to previous figures and 

 descriptions. It has features which absolutely distinguish 

 this group of birds. 



The entoglossal has a considerable median foramen, or 



Pig. 131.- 



-HyoiD OF Stringqps (atteb Mivabt). 

 B. Ventral. C. Lateral. 



A. Dorsal Aspect. 



6, basihyal ; e, entoglossum ; p, parahyal proceas : u, urohyal ; ho, Lypobrancbial ; 

 cb, ceratobranchial, 



more usually is composed of two separate pieces united in front 

 by cartilage. The basihyal is broad, and it develops on either 

 side a forwardly directed piece (figs. 131-3), ior which Dr. 

 MivAET has suggested the name of parahyal piece. This 



