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wards : of these, the anterior, which is the shortest and deepest, forms the upper 

 boundary of the orbit ; the middle curve, somewhat longer and shallower, bounds 

 the anterior third of the temporal region ; the rest of which is defined by the pos- 

 terior, longest and shallowest curve, from which the ridge is continued down to 

 the posterior origin of the zygomatic process. The angle between the first and 

 second curvatures represents the posterior or external orbital process. 



The median third of the short and broad facial portion of the skull is formed 

 by the nasal bones, which are anchylosed together along their narrower posterior 

 halves, and likewise to the frontal bones : the internasal suture is not oblite- 

 rated along the expanded anterior halves of the bones ; each of which presents a 

 small notch at its broad, thick, truncated and deflected anterior margin. The 

 naso-maxillary sutures remain on each side. From these, the maxillary bones 

 arch downwards, sUghtly expanding forwards, and terminate by a thick rounded 

 edge about half an inch behind the nasal bones. 



The strong and singularly complicated zygomatic arches circumscribe a lon- 

 gitudinal elliptical space on each side of the middle third of the long and narrow 

 skull : the posterior origin of each arch presents a horizontally slightly hollowed 

 surface, giving origin to, and supporting the posterior fasciculi of, the temporal 

 muscle : the anterior termination of the zygomatic arch presents, in hke manner, 

 a horizontal concavity for the support of the eye-ball ; the plane of the interme- 

 diate part of the arch is changed from the horizontal to the vertical position, and 

 the edge of the compressed ascending process rises above the middle of the zy- 

 o-oma, and meets the eye looking down upon the upper surface of the skull. 



The most extraordinary features which this surface presents are accidental to the 

 individual example under consideration, and arise out of two extensive fractures 

 of the skull which the animal has received some time before its death. One of 

 these fractures is four inches in length, and extends in the axis of the skull, 

 across the fronto-maxillary suture, near the right orbit. The blow has depressed 

 the outer table of the skull, but the fracture is entirely healed, and is indicated 

 by the furrows along which the bone sinks below its natural level into the large 

 frontal sinuses. The surface of the supra-orbital plate, which has participated 

 in the primary injury, and been affected by the inflammation consequent thereon, 

 is roughened, and, as it were, eaten into by numerous small vascular grooves 

 and fissures. The second fracture is more extensive, and affects the middle 



