EXPLANATION OF ABBREVIATIONS. 



a, rectus superior. 

 &, rectus internus. 



c, rectus inferior. 



d, rectus externus. 

 0, obliquus superior. 

 p, obliquus inferior. 

 h, retractor bulbi. 



t, levator palpebrse. 



s, elements associated with tbe levator palpebral, perhaps parts of it. 



X, x', muscular elements of unknown significance. 



The cranial nerves are designated by Roman numerals. 



Plate I. 

 Fig. 1. Photograph of the Baldwin synote, perfect side. 

 Fig. 2. The same as Fig. 1, imperfect side. 



