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contact with that bone. On its ventral edge there is a pronounced angularcminence, thedorso-anterior 

 (lateral) surface of which, and the corresponding surface of the shank of the bone above it, bears a 

 condvlar thickening which articulates, by the intermediation of a päd of semi-cartilaginous tissue, 

 with the internal (postero-mesial) surface of the articular process of the premaxillary, the päd of 

 tissue being suspended in tissues that are attached to the premaxillary and rostral rather than to the 

 maxillary. 



On the dorsal edge of the extreme antero-mesial (proximal) end of the maxillary there is a 

 small bluntly pointed process which projects dorso-mesiallyand touches, or almost touches, the ventral 

 surface of the rostral, being bound to that cartilage by tough fibrous tissue. Beginning at the base 

 of this little process, a flange-like process rises from the dorsal edge of the maxillary, extends distally 

 a short distance along the shank of that bone, and then turns transversely, almost at right angles, 

 across its dorsal surface. The process thus has longitudinal and transverse portions, the latter of 

 which is much the more important and forms a tall flange-like portion of the entire process which lies 

 perpendicularlv to the maxillary and approximately in a vertical longitudinal plane of the body. 

 This right-angled and flange-like process may be called the ascending process of the maxillary. Tnto 

 the angle between its two portions the postero-lateral edge of the articular process of the premaxillary 

 fits, the ascending process of the maxillary thus embracing and giving articulation, in the angle between 

 its two parts, to the edge of the articular process of the premaxillary. From the mesial surface of the 

 transverse portion of the process, a streng ligament, already referred to, runs upward and backward 

 and is inserted on the lateral surface of the rostral, near its ventral edge. 



The transverse limb of the ascending process of the maxillary is longer than the shank of the 

 maxillarv is wide, and hence projects anteriorly beyond the lateral edge of that shank. The ventral 

 edge of this projecting portion of the ascending process is fused with the anterior end of another plate- 

 like process of the maxillary, this latter process arising in a longitudinal line from the dorso-anterior 

 (lateral) surface of the shank of the bone, beginning immediately distal to the ascending process. 

 This longitudinal process, which may be called the ligamentary process of the bone, projects downward 

 and forward, eaves-like, along the anterior (lateral) surface of the premaxillary. It gives Insertion, 

 on the antero-mesial (proximal) corner of its external, dorso-anterior sui-face, to the ethmo-maxillary 

 and naso-maxillary ligaments, which ligaments from there run postero-dorso-mesially to their points 

 of origin on the mesethmoid process and the nasal bone respectively ; the ligaments, in their course, 

 lying upon and crossing latero-mesially the anterior edge of the ascending process of the maxillary. 

 From the antero-mesial (proximal) edge of the process a wide band of fibrous tissue arises, and, running 

 mesially, crosses the external surfaces of the ascending processes of the two premaxillaries, near their 

 bases, and has its insertion on the antero-mesial edge of the ligamentary process of the maxillary of 

 the opposite side. The cut ends, only, of this band are shown in the figures. This intermaxillary 

 band of tissue, together with the short ligament, on either side, and already described, that extends 

 from the base of the ascending process of the premaxillary to the mesial (proximal) end of the ligament- 

 ary process of the maxillary, hold the two maxillaries against the edges of the articular processes 

 of the premaxillaries, the two ligaments being directly opposed to a ligament that arises from the 

 extreme postero-lateral (distal) corner of the ligamentary process. This latter ligament runs postero- 

 ventrally across the dorsal surface of the shank of the maxillary and then onward along the internal 

 surface of that bone, lying in the thin membrane that extends from the inner surface of the maxillary, 

 near its dorsal edge, to the ventro-lateral edge of the palato-quadrate apparatus, and that forms part 



