. Cunningham's Text-book of anatomy. Anatomy. 146 OSTEOLOGY. which modify the development of the bone. They usually include the whole thickness of the cranial wall, or they may only involve the outer or inner tables of the cranial bones. They are most frequent in the region of the lambda and the lambdoid suture. They occur commonly about the pterion, and in this situation are called epipteric bones (Flower). By their fusion with one or other of the adjacent bones they here lead to the occurrence of a fronto-squamosal suture. Their presence has also been noted along the line of the sagittal sut
. Cunningham's Text-book of anatomy. Anatomy. 146 OSTEOLOGY. which modify the development of the bone. They usually include the whole thickness of the cranial wall, or they may only involve the outer or inner tables of the cranial bones. They are most frequent in the region of the lambda and the lambdoid suture. They occur commonly about the pterion, and in this situation are called epipteric bones (Flower). By their fusion with one or other of the adjacent bones they here lead to the occurrence of a fronto-squamosal suture. Their presence has also been noted along the line of the sagittal suture, and sometimes in metopic skulls in the inter-frontal suture. They are occasionally met with at the asterion and more rarely at the obelion. They appear less frequently in the face, but their presence has been noted around the lacrimal bone, and also at the' extremity of the inferior orbital fissure, where they may form an independent nodule wedged in between the great wing of the sphenoid, the zygomatic, and the maxillary bones. OSSA FACIEI. The bones of the face, seven in number, comprise two maxillae, two palates, two zygomatics, with the mandible or lower jaw. Lacrimal groove The Maxillae. The maxillae, of which there are two, unite to form the upper jaw. Each consists of a body, with which are connected four projections, named respectively the zygomatic, frontal, alveolar, and palatine processes. The body (corpus) is of pyramidal form, and contains within it a hollow called the maxillary sinus. It has four surfaces—an anterior or facial, an infra-temporal or postero-lateral, an orbital or supero-lateral, and a nasal or medial—and four processes—the malar, frontal, alveolar, and palatine. Surfaces.— The facies anterior (anterior surface) is confluent below with the alveolar process. Above, it is separated from the orbital aspect by the margo infraorbitalis (infra-orbital margin), whilst medially it is limited by the free margin of the nasal notch., which ends be
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