27G MYOLOGY OF THE TOXGUE OF PARROTS. 



PLATE XXVIII. 



rig. '2-i. Ant ararcmiut. Ventral view after extraction from the liead ami removal of the anterior 

 niylohyoiileus. On the right, the jiosterior mylohyoideus (serpi- and stylohyoideus) and sterno- 

 hvoideiis have been removed ; the geniohyoideu3 has been similarly removed upon the left. 

 (Reduced J.) 



rig. 25. Camtiiu ijahrita. Ventral view of the hyoid apparatus after extraction from tlio head. On the 

 right, the serpihyoideus, stylohyoideiis, and ceratohyoideus have been removed, and the uro- 

 liypobruncliial tendon and ceratoglossus inferior accessorius have been reflected to one side. The 

 sternohyoideus has been removed from both sides. (Magnitied I7.) 



Fig. 26. Strinqops hahro/itiltu!. Ventral view of the hyoid apparatus after removal from the head. On the 

 right, the scrpihyoideus, stylohyoideus, coratoglossus inferior accessorius, uro-hypobranchial tendon, 

 and ceratohyoideus have been removed. The sternohyoideus and geniohyoideua have been 

 removed from both sides. (Magnified 1|.) 



Fig. 27. Ara macao. Ventral view, after removal of the mylohyoideus anterior. On the left, the cerato- 

 hyoideus and posterior mylohyoideus have been removed, and the uro-hypobranchial tendon and 

 ceratoglossus inferior anticus accessorius have been reflected to the left. Upon both sides the 

 .sternohyoideus has been removed. (Reduced 5.) 



Fig. 28. Chrijsotis ochrocepJuda. Ventral view of the hyoid apparatus after extraction from the head and 

 removal of the anterior mylohyoideus. On the left, the posterior mylohyoideus has been removed, 

 the ceratoglossus inferior anticus accessorius turned forwards, and the ceratohyoideus partially 

 dissected away, in order to reveal the ceratoglossus inferior posticus. The sternohyoideus and 

 geniohyoideus have been removed from both sides. (Magnified li.) 



Fig. 29. Psitiacus erithacits. Ventral view of the hyoid apparatus after extraction from the head and removal 

 of the anterior and posterior mylohyoideus. On the left, the ceratohyoideus, sternohyoideus, and 

 geniohyoideus have been removed, and the uro-hypobranchial tendon and ceratoglossus inferior 

 anticus accessorius have been reflected. On tho right, the ceratohyoideus, ceratoglossus inferior 

 anticus and posticus, ceratoglossus lateralis, and sternohyoideus have been removed, in order to 

 show the relation of the hypoglossus obliquus to the basihyal and hypobranchial. (Magnified 



Fig. 30. Connriis cactorum. Ventral view after removal of the anterior mylohyoideus. On the right, the 

 posterior mylohyoideus and ceratohyoideus have been removed, and the uro-hypobranchial tendon 

 and ceratoglossus inferior accessorius reflected to one side. The geniohyoideus and sternohyoideus 

 have been similarly removed upon both sides. (Magnified 11.) 



Fig. 31. Coracopsis vasa. Ventral view, after removal of the anterior mylohyoideus. On the right, the 

 posterior mylohyoideus (serpi- and stylohyoideus) and ceratohyoideus have been removed, and 

 the uro-hypobranchial tendon and ceratoglossus inferior anticus accessorius have been reflected. 

 (Reduced 3.) 



Fig. 32. PaJieoniis torquata. Ventral view. On the right, the posterior mylohyoideus and sternohyoideus 

 have been removed, and the uro-hypobranchial tendon and ceratoglossus inferior accessorius have 

 been reflected to the right. The geniohyoideus has been removed from both sides. (Magnified 1|.) 



Fig. 33. Broio'jerys p»jri-1iopterus. Ventral view. On the left, the posterior mylohyoideus, ceratohyoideus, 

 and sternohyoideus have been removed, and the uro-hypobranchial tendon and ceratoglossus 

 inferior accessorius have been reflected. On the right, tho ceratohyoideus has been left in situ, 

 and the ceratoglossus inferior accessorius and uro-h^'pobranchial tendon are undisturbed. The 

 geniohyoideus aud anterior mylohyoideus have been removed from both sides. (Magnified 1^.) 



Fig. 3-1. Psiitinus incertus. Ventral view. On the left, the posterior myloh3-oideu3, uro-hypobranchial tendon, 

 ceratoglossus inferior accessorius, and ceratohyoideus have been removed in order to show the 

 ceratoglossus inferior posticus. Upon both sides the sternohyoideus, anterior mylohyoideus, and 

 geniohyoideus have been removed. (Magnified 1^.) 



Fig. 35. Ptisies erijlhropterus. Ventral view of the hyoid apparatus after removal from the head. On the 

 left, the posterior mylohyoideus, ceratohyoideus, uro-hypobranchial tendon, and the ceratoglossus 

 inferior accessorius have been removed. The geniohyoideus and sternohyoideus have been similarly 

 removed from both sides. (Magnified 1|.) 



Fig. 36. Coaurus jendaya. Ventral view after extraction from the head and removal of the anterior mylo- 

 hyoideus. On the left, the posterior mylohyoideus and ceratohyoideus have been removed, and 

 the ceratoglossus inferior accessorius and uro-hypobranchial tendon have been reflected to one side. 

 Upon both sides the sternohyoideus and geniohyoideus have been removed. (Magnified 14.) 



