OF THE TONGUE OF PAEEOTS, 



231 



In Palceorni$ torquata (PI. XXVI. fig. 7), Pieocephalns ruppelU, and Poeocephalus 

 robustus the origin of the muscle extends ahnost to the posterior extremity of the 

 hypobranchial ; in both, the bifid tendon is similar to that in Eclectus, but it is 

 not so strongly developed, and less so in Fceocejihalus than Palceornis. In Ptistes 

 erythropterus the muscle is similar to that in PoeoGephalus, but its origin only extends 

 halfway along the hypobranchial. 



Text-fi?. 



Eclectus pectorali^.—BoTsal view. The trachea (T.) has been turned to the right and only sufficient of the 

 stylohyoideus {st.h.) left to show its insertion. (Twice nat. size.) 



g. = glottis. 

 T. = trachea. 



Additional letters. 



tJt.c/. = thyroglossus. 

 tJiJi. = thyrohyoideus. 



th.li.a. = thyrohyoideus 

 accessorius. 



In Platycercus eximius (PL XXVI. fig. 11), Pezoporns formosus (PL XXVI'. 

 fig. 8), Prionituriis sp. 1, Cyanorhamplms auriceps, and Tanygnathus mulleri the tendon 

 of insertion is bifid and is similar to that in Conurus jendaya, but its anterior portion 

 is more or less distinctly cylindrical and slightly elongated, and it foreshadows the 

 markedly cylindrical tendon of the Loriidse (PL XXVII. fig. 21, ten.). 



In Psittacula passerina, Caica leucogaster, and Bolborhynchus Uneolatus the muscle 

 arises from the anterior third of the hypobranchial and is inserted by a cylindrical 

 tendon to the mesoglossus ; the tendon is not bifid. 



