474 



ANATOMY OF VERTEBRATES. 



523 



mois, Goral, Saiga, Cliiru, and one or two others, the premaxillaries 

 do not join the nasals ; but this junction is seen in most Antelopes. 

 In all, as in the Sheep and its allies, both the superoccipital, 

 fig. 323, 11, and fig. 324, «, and the parietals, 

 ib. 9 and b, maintain their position at the 

 back part of the vertex : the frontals, ib. 8, 9, 

 and c, still fiarm the chief part and alone 

 develope the horn-cores ; the nasals, 7, are not 

 expanded posteriorly, as in CamelidcB. Both 

 frontals, c, and malars, k, fig. 324, extend far 

 in advance of the orbit, d, but are exceeded 

 in this extension by the lacrymals, z, which 

 articulate with the nasals, /*, for an equal 

 extent with the maxillary, h. In the wild 

 Oois Ammon there is a lacrymal pit, and this, 

 in Ovis Virjnei, deeply impresses the facial 

 plate of the bone. The premaxillaries in the 

 same wild Thibetan sheep join the nasals 

 suturally, but in the domestic Ovis Aries, the 

 premaxillaries, (/, barely touch the nasals. 

 In the Nahura Argali {Ovis Nahura), the premaxillaries do not 

 reach the nasals : nor is the lacrymal impressed with the pit. The 

 ' incisive ' fissures in the palatal plates of the premaxillaries, figs. 



324 



Skull of Sheep. 



Skull of Sheep, h(jrnless rar. 



168 and 323, «, are long and narrow. The maxillo-palatal sutures, 

 fig. 168, d, turn obliquely outward and backward to the inner 

 Avail of the socket of the last molar, opposite the hinder half of 



