Contributions to the anatomy and development of the salivary glands in the mammalia . is muscle(Procyon). As the gland enlarges, the influence of the muscle becomesmore pronounced and the axis becomes vertical (Mephitis). The ductloses its apical emerge and is displaced ventrad; a dorsal polebegins to rise above the hilus (Taxidea, Gulo). These fonns have alsoan extension along the duct. The large glands, retaining the verticalaxis, develop a larger dorsal pole, while the duct emerges from, or near 184 ANATOMY OF THE SALIVARY GLANDS IN THE CARNIVORA the middle of, the cranial surface. Finally
Contributions to the anatomy and development of the salivary glands in the mammalia . is muscle(Procyon). As the gland enlarges, the influence of the muscle becomesmore pronounced and the axis becomes vertical (Mephitis). The ductloses its apical emerge and is displaced ventrad; a dorsal polebegins to rise above the hilus (Taxidea, Gulo). These fonns have alsoan extension along the duct. The large glands, retaining the verticalaxis, develop a larger dorsal pole, while the duct emerges from, or near 184 ANATOMY OF THE SALIVARY GLANDS IN THE CARNIVORA the middle of, the cranial surface. Finally they become reniformand may even present a transverse fissure at the hilus. These changesare present in increasing degree in Canis, Felis leo, Felis Domestica,and Ursus thibetanus. In these forms there is evidently dorso-ventral compression between the mandible, the masseter and internalpterygoid muscles and the parotid gland dorsally, and the infra-hyoidmuscles ventrally. In Zalophus alone the submaxillary does notreach the cephalohvimeralis, but is in apposition with an enormous. d. e. Fig. 17. Schemata of the submaxillary gland in carnivores. a. Cat, embryo. c Raccoon. b. Sea-lion. d. Badger. e. Thibetan bear. l>Tnphnode at the ventral border of the digastric. Its axis makes anangle of about 45° with the horizontal. The partoid (Fig. 18) tends to be confined by the auditory meatusand the cephalohimieralis muscle. In Zalophus (a) the gland ishardly large enough to be affected by these structures; at most arudimentary postmeatal process is distinguishable. In Felis leo (Z>)the gland is molded upon the meatus; the premeatal and post-meatal process are still small; the border between them is concave-The processes are more marked in Fehs domestica (c) and Canis,and these forms have also a loosely constructed ventral angle whichreaches forward along the duct and tends to develop a ventral processdescending upon the submaxillary. With further enlargement thegland tends to ex
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmammals, bookyear1913
