Teans. Zool. Soc, Vol. XVI.] 



IToface p. 264. 



THE CLASSIFICATION OF PARROTS ACCORDING TO THEIR LINGUAL MYOLOGY 



AND OSTEOLOGY. 



(A.) Parahyal arch complete. Styloliyoideus absent. Outer portion of serpihyoideus inserted to basihyal. Cerato- 

 glossus inferior iwsticus extends back to posterior end of hypobranoHal. A ceratoglossus inferior anticus 

 aceessorius absent. 

 • {{!) The tendon of the ceratoglossus inferior spreads out in a fan-shaped manner over the posterior portion 

 g -; of the muscle. Inner division of serpihyoideus contracted at origin. 



Eos. 

 (2) The tendon of inferior ceratoglossus is merely continued back on to the ceratoglossus inferior posticus, 

 without widening. Serpihyoideus is not contracted at origin. 

 Loriits. 

 Vini. 



m 



t.) Parahyal arch complete. Stylohyoideus narrow, inserted to hypooleidium of parahyal arch, and not confluent 

 with serpihyoideus at any part of its course. Outer (anterior) portion of serpihyoideus not represented. 

 Ceratoglossus inferior posticus does not extend back to posterior end of hypobranchial. The posterior 

 division of anterior mylohyoideus absent. 

 Ifestor. 



(C.) Parahyal arch incomplete. Stylohyoideus usually weU developed, and inseited to or near apical portion 

 of Darahval nrocess. Outer nortion of seroihvoideus inserted to head of hvrobxanehiaL-__Ji.e_ceratDehissus-_ 



