4. =The molar gland= (=glandula molaris=) (Fig. 65, 9) lies between the orbicularis oris and the mucosa of the lower lip. It stretches from the cranial border of the masseter to a point between the first premolar and the canine. It is flat, broad caudad, and ends in a point craniad. It has several ducts which pass straight through the cheek and open on the mucous surface of the mouth. 5. The =infraorbital= (or =orbital=) =gland= lies in the lateral part of the orbit on its ventral floor. It is ovoid and about one and one-half centimeters long and one-third as thick. Its ventral end rests against the mucosa of the mouth just caudad of the molar tooth. Its duct leaves the ventral end and opens into the mouth at a point about three millimeters caudad of the molar tooth. THE TEETH. DENTES.--The adult cat has thirty teeth, fourteen in the lower jaw and sixteen in the upper jaw. There are twelve =incisors=, four =canines=, ten =premolars=, and four =molars=. The tooth formula for the cat is then 3 - 3 1 - 1 3 - 3 1 - 1 _i_-----, _c_-----, _pm_-----, _m_-----. 3 - 3 1 - 1 2 - 2 1 - 1 The teeth are implanted in the alveolar borders of the premaxillaries, maxillaries, and mandible. In each tooth can be distinguished the =root=, imbedded in the socket of the bone, the =crown=, which projects above the gums, and a narrow =neck= connecting the two. The root is composed of one or more separate fangs; the crown bears one or more points or cusps. At the cranial end of each jaw are six =incisor= teeth (Figs. 93 and 94, _a_). These are imbedded in the alveolar borders of the premaxillaries and the mandible. The incisor teeth are small, with a crown bearing a sharp edge which is notched so as to form three minute cusps. The root of each has a single fang. The lateral incisors are the largest in each jaw, and those of the upper jaw are larger than those of the lower. [Illustration: FIG. 93.--UPPER JAW, WITH ROOTS OF THE TEETH LAID BARE. _a_, incisors; _b_, canine; _c_, first premolar; _d_, second premolar; _e_, third premolar; _f_, molar.] Caudad of the incisors, and in the upper jaw separated from them by a slight interval, are the =canines= (_b_), two in each jaw. These are long, strong, pointed teeth, deeply imbedded in the mandible and maxillaries, their large sockets causing a rounded swelling on the external surface of the bones. Each has a single fang and a single cusp. When the mouth is closed the upper canines lie laterocaudad of the lower ones.