Dental cosmos . or part of the palate of thehog. A slight asymmetry often exists in the horse; and instead ofbeing in opposite, it may be in alternate series. For a full discussion PERISCOPE. 67 of the subject with literature, especially for the description of thehuman rugae in the embryo and infant, see Carl G-egenbaur,Morpholog. Jahrbuch, iv, 673. The following embraces a brief description of the rugae in manand a list of names which will be employed in this paper. Two kinds of rugae are recognized, the longitudinal and the trans-verse. The longitudinal lie in the median line and answer to t
Dental cosmos . or part of the palate of thehog. A slight asymmetry often exists in the horse; and instead ofbeing in opposite, it may be in alternate series. For a full discussion PERISCOPE. 67 of the subject with literature, especially for the description of thehuman rugae in the embryo and infant, see Carl G-egenbaur,Morpholog. Jahrbuch, iv, 673. The following embraces a brief description of the rugae in manand a list of names which will be employed in this paper. Two kinds of rugae are recognized, the longitudinal and the trans-verse. The longitudinal lie in the median line and answer to theline of union between the right and left maxillae and premaxillae ;the transverse lie across the palate and are composed of a right andleft set. The longitudinal kind is divided into two parts, viz: the raphe,or the seam-like line which occupies the middle of the palate at themaxillae, and the incisive pad, which is an elliptical or pear-shapedbody which answers to the position of the incisive foramen. Fig. The arch i3 wide and moderately arched. The rugae as a rule are entire,—the exceptions being bothfirst post-sutural rugae, and the last post sutural on the left side. The neck-folds are conspicuous. The raphe is ordinarily composed of two parts, one of whichrepresents the median line and the other is deflected from it to theleft at the posterior free end. (See Figs. 2, 4, 7.) The rugae extend back no farther than the first molar tooth. Theregion answers to an imaginary plane which bisects the infra-orbitalforamina. The rugae are composed of papules which are arrangedin series, an arrangement which i^ most evident in the posteriorfolds. The folds are smallest where the membranes are the thinnestand are the largest where they are the thickest. As a rule the incisive pad is in line with the raphe, but it may bedeflected (see Fig. 3) or continued forwards between the centralincisors (see Fig. 5). Occasionally the anterior end can be seen fromthe front lying in the interv
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