20 



attachment and the powerful character of the malar portion of the masseteric 

 muscle ; and when it is considered by how slender a stem its forces are trans- 

 ferred from the malar to the fixed maxillary bone, the advantage of the persistent 

 malo-maxillary suture, and of the yielding motion it allows to the malar bone, 

 will be obvious. 



The contour of the orbit describes a full vertical ellipse, but is open or in- 

 complete posteriorly for one-fourth of its extent ; its upper third is developed 

 into a slight obtuse supraciliary ridge ; the rest is smoothly rounded off. 



The Umits of the lachrymal bone are not defined, but a small lachrymal 

 foramen, protected anteriorly by a small angular process, is situated at the upper 

 and anterior part of the orbit, three lines from the margin : the lachrymal de- 

 pression extends an inch below the foramen. 



A smooth protuberance projects from the lower and anterior margin of the 

 orbit, formed by the junction of the malar with the maxillary bones ; the suture 

 defining this articulation runs along the lower and anterior part of the orbit. 

 The malar process of the maxillary is perforated by the large suborbital canal, 

 the outer opening of which is concealed, in a side-view of the skull, by the above 

 protuberance. 



The facial or rostral part of the skull, anterior to the orbit, is singularly short 

 and large ; both its vertical and transverse diameters much exceed its length. 

 It is bounded above by the broad, shghtly convex and almost confluent nasal 

 bones, and the rest of its extent is formed by the superior maxillaries. 



The extremity of the nasal bone is slightly deflected : it expands both in 

 breadth and depth, and terminates by a thick rugged margin which projects 

 beyond the corresponding margin of the maxillary, and supports a central trans- 

 versely elliptical depression. 



The lateral or outer plate of the superior maxillary bone is of a nearly quadrate 

 figure, shghtly concave anterior to the orbit, and convex where it forms the 

 alveolus of the first molar tooth. Its anterior margin is smoothly rounded ofl", 

 and descends almost vertically to terminate in a blunt-pointed angle about an 

 inch in advance of the first molar tooth. 



An intermaxillary bone may probably have completed the length of the upper 

 jaw, which, in its present state, is exceeded for about an inch by the lower jaw. 

 Such bone, if present, must have been very small, and loosely connected with 



