. The anatomy of the domestic animals . Veterinary anatomy. 66 THE SKELETON OF THE HORSE and nasal, are smooth and rounded. The dorsal border is free, thick, and smooth,- it concurs with the free margin of the nasal bone in forming the naso-maxillary notch (Incisura nasomaxillaris). The ventral border is dentated and joins the maxilla; at its anterior end it forms with the latter the alveolus for the permanent canine tooth.^ The posterior ex- t i^ F^ tremity fits into the interval be- OT tween the nasal bone and the maxilla. The palatine process (Pro- cessus palatinus) is a thin plate wh
. The anatomy of the domestic animals . Veterinary anatomy. 66 THE SKELETON OF THE HORSE and nasal, are smooth and rounded. The dorsal border is free, thick, and smooth,- it concurs with the free margin of the nasal bone in forming the naso-maxillary notch (Incisura nasomaxillaris). The ventral border is dentated and joins the maxilla; at its anterior end it forms with the latter the alveolus for the permanent canine tooth.^ The posterior ex- t i^ F^ tremity fits into the interval be- OT tween the nasal bone and the maxilla. The palatine process (Pro- cessus palatinus) is a thin plate which forms the anterior part of the basis of the hard palate. Its nasal surface (Facies nasalis) has a longitudinal ridge which forms with that of the other side a groove for the septal cartilage; lateral to the ridge there is a groove for the vomero-nasal organ. The palatine surface (Facies palatina) is flat. The medial border is serrated and meets its fellow at the median pala- tine suture. The lateral border is separated from the maxilla and the nasal process by the palatine fis- sure (Fissura palatina). The pos- terior extremity fits into the inter- val between the vomer and the palatine process of the maxilla. Development.—The premax- illa ossifies from a single center. Fusion of the two bones is com- plete at the end of the third or the beginning of the fourth year. The Palatine Bones The palatine bones (Ossa pala- tina) are situated on either side of the choanse or posterior nares, and form the posterior margin of the hard palate. Each is twisted so as to form a horizontal and a perpen- dicular part. The horizontal part (Pars hori- zontalis) is a narrow plate which forms the posterior part of the hard palate. It presents smooth nasal and palatine surfaces (Facies nasahs, palatina). The medial border meets its fellow at the median palatine suture, on the nasal aspect of which is the nasal crest. The anterior border joins the palatine process of the maxilla at the tr
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