voi.xiv.j Leach, The Myology of the Bell-Magpie. II 



Muscles of the Upper Larynx (2) [18J. 



28. The constrictur-glottidis. 



29. The thyreo-arytenoideus. 



Muscles of the Lower Larynx (7) [19J. 



30. The tracheo-lateralis. 



31. The broncho-trachealis posticus. 



32. The broncho-trachealis anticus. 

 ^^. The broncho-trachealis brevis. 



34. The bronchialis posticus. 



35. The bronchialis anticus. 



36. The sterno-trachealis. 



These muscles have been so well described by Miiller, Owen, 

 Shufeldt, and other writers that they are amongst the best known 

 of bird muscles. As Strepera and the other birds dissected agree 

 with the descriptions of Owen and Shufeldt, it is not proposed 

 to describe the muscles in detail. Drawings of the muscles of 

 the Strepera have been made from the dissections. 



In Strepera these muscles of the syrinx are well developed, and 

 are inserted into the ends of the cartilaginous half-rings of the 

 bronchi. Strepera is, therefore, placed amongst the Acromyodian 

 birds, or Oscines. 



Muscles of the Eye (37-47) [20]. 

 ^j. The orbicularis palpebratum. 



38. The levator palpebrce superioris. 



39. The depressor palpebrce inferioris. 



40. The quadratus nictitantis. 



41. The pyramidalis nictitantis. 



42. The obliquus superior. 



43. The obliquus inferior. 



44. The rectus superior. 



45. The rectus inferior. 



46. The rectus externus. 



47. .The rectus inter nus. 



These muscles agree in Strepera exactly with what Shufeldt 

 and Owen have figured in other birds. Drawings have been made 

 from the dissections of the Strepera, but it is not proposed to add 

 a full description, when that has already been done by Shufeldt, 

 Owen, and others. 



The Muscle of the Ear (i). 



48. The tensor-tympani [20rt].— This muscle, I find, differs in 

 Strepera and the Australian Raven from what Shufeldt figures 

 for the American Raven. In Strepera it arises fleshy from the 

 inner lower border of the quadrate bone and the neighbouring 

 part of the lower mandible. It runs closely apposed to the 

 quadrate bone, to be inserted on the lower outer edge of the 

 tympanum. Shufeldt found it arose in the American Raven from 

 the " inner end of the quadrato-jugal bone, and the contiguous 

 surface of the quadrate." 



