. The cat; an introduction to the study of backboned animals, especially mammals. Cats; Anatomy, Comparative. CHAP. II.] THE GATS GENERAL FORM. The mucous membrane is connected with the suhjacent parts by HuhmucoHS areolar tissue, which is often lax, so that the mucous membrane, when not stretched, is thrown into efFaccable folds or rugm. It may also form folds which are not to be effaced by any stretching of the skin, as, , on the palate (Fig. 86). The membrane lining the mouth abounds in small glands', those within the cheeks and lips being termed buccal and labial respectively. § 16. Th
. The cat; an introduction to the study of backboned animals, especially mammals. Cats; Anatomy, Comparative. CHAP. II.] THE GATS GENERAL FORM. The mucous membrane is connected with the suhjacent parts by HuhmucoHS areolar tissue, which is often lax, so that the mucous membrane, when not stretched, is thrown into efFaccable folds or rugm. It may also form folds which are not to be effaced by any stretching of the skin, as, , on the palate (Fig. 86). The membrane lining the mouth abounds in small glands', those within the cheeks and lips being termed buccal and labial respectively. § 16. The mucous membrane of the mouth has certain calcareous appendages—the teeth—which are mainly calcifications^ of the corium, but in part are ccteronic—or calcifications of the epithelium —so that the nature of each is compound. The teeth are not only parts of the external skeleton, but are. Fio. 12.—The Teeth of the Eight Side of a Cat's Mouth, seen on their Inner Surfaces. Incisors. JJW. Premolars. iji. Two miliars. (The outer aspect of the teeth, is shown ill Fig. iO. See also Fig. 29.) j closely related to the internal skeleton also, since they are implanted in special sockets—or alveoli—provided for them in the margins of the jawbones, which margins are on that account spoken of as " ; The part of each tooth which is thus implanted is its " ; The part which appears above the surface of the niucous membrane is called the "crown," and the line of junction is the cervix, or nech. Each alveolus closely invests the fang contained within it. Most of the teeth have but a single fang, which tapers as it penetrates its alveolus; but there may be two or three fangs to a single tooth. The teeth of the cat, when adult, should be thirty in number. Those of the two sides of each jaw are alike, but those of the upper jaw differ from those of the lower jaw. The three front teeth of each lateral half of the upper jaw are ve
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