MYOLOGY OF THE TONGUE OF PAEEOTS. 



PLATE XXVI. 



Fig. 1. Kos riciniata. Ventral view, after removal of the skin. On the left the inner portion of serpihyoidcus 

 has been removed and the muscles slightly separated to show their relations in tlie otherwise 

 undisturbed condition, (llagnified 1|.) 



Fig. 2. Strinijoiis huhroplUus. Ventral view, after removal of the sidn. (Reduced \.) 



Fig. 3. Psittacus erithcccus. Ventral view. On the left, one-half of the lower bill has been removed, as well m 

 the persistent fascia (/.), which is a backward prolongation of the anterior portion of the anterior 

 mylohyoideus. (Reduced ^.) 



Fig. 4. Cacatua galerita. Ventral view. The fascia (/.) of the left side has been removed to show the similar 

 but very unusual one (/j).) which is continued back from the posterior division of the muscle, 

 (Reduced |.) 



Fig. 5. Platycerciis eximius. Ventral view after removal of the skin. On the left, one-half of the lower jaw 

 has been removed. (Magnified li.) 



Fig. 6. Ptisfes erythropterns. As in fig. 10, except that the thyrohyoideus is not hidden. (Magnified 14.) 



Fig. 7. Palccornis torquata. Dorsal view, after removal of the membrane of the tongue. The trachea and 

 larynx have been turned over to the right, and only sufficient of the stylohyoideus and sterno- 

 hyoideus represented to show their insertions. The geniohyoideus has been removed upon the 

 right. (Magnified 1;^.) 



Fig. 8. Pezoporiis fot'mosus. Dorsal view, with the trachea and most of the muscles in situ. On the left, the 

 sternohyoideus, stylohyoideus, and serpihyoidcus have been removed, and the thyroglossus cut 

 through near its insertion and reflected outwards, in order to reveal the thyrohyoideus and cerato- 

 glossus superior. The posterior mylohyoideus has been represented on the right, in order to 

 especially indicate the very slender insertion of the stylohyoideus and the contracted origin of the 

 inner portion of the serpihyoideus. The geniohyoideus has been removed upon both sides. 

 (Magnified 2 J.) 



Fig. 9. Conurus jendaya. Dorsal view, after removal of the membrane of the tongue. The trachea has been 

 turned over to the right and the geniohyoideus of either side removed ; on the right the 

 sternohyoideus and posterior mylohyoideus have also been removed. On the left only enough of 

 the stylohyoideus has been left to show its insertion, and the serpihyoideus has been removed. 

 (Magnified li.) 



Fig. 10. Pmoceplialus ruppelli. Dorsal view, with the muscles and trachea in situ, and only sufficient of the 

 stylohyoideus represented to show its insertion. The thyrohyoideus is hidden beneath the thyro- 

 glossus. (Magnified 2^.) 



Fig. 11. Platycercus e.vimius. As iu fig. 17, except that the mesoglossus is not cut and the origin of the 

 thyroglossus is intact. (Magnified 2.) 



