404 



ANATOMY OF VERTEBRATES. 



Capillaries of Parotid of Pig, magn. cxxv" 



they form a network, which is distributed over the elementary 

 parts of the gland. 



The parotids are large in all Euminants. In the Ox the parotid 

 is vertically extended behind the long ascending mandibular ra- 

 304 m us from the lower border 



of the ear-conch to the 

 angle : the duct, as in the 

 Horse and Hog, follows the 

 lower contour of the mas- 

 seter, and penetrates the 

 mouth opposite the first 

 upper true molar. 



The submaxillary lies be- 

 hind and upon the angle ot 

 the jaw: it is relatively 

 larger than in the horse ; its 

 duct traverses the sublin- 

 gual gland in passing to 

 its termination below the 

 fringed fore part of the 

 framum. In the Giraffe its 

 opening is similarly pro- 

 tected by a small valvular papillose fold. There are three small 

 elongate masses of buccal glands, over the alveoli of both upper 

 and lower molar series : opening upon the angle of reflection of 

 the gum-membrane upon the cheeks or lips. 



In the Carnivorous order the salivary system is least developed 

 in the Seal-tribe : they have the parotid either very small or 

 wanting : and have no zygomatic glands. In the Dog the pa- 

 rotid, fig. 305, «, is comparatively small, flat externally, with 

 the duct continued from near the lower end, and traversing the 

 masseter, in an almost straight course, at an equal distance from 

 the upper and lower borders of the muscle : it terminates opposite 

 ♦he upper carnassial, ib. b. The submaxillary, ib. c, is a large 

 globose gland, beneath and partly covered by the parotid behind 

 the angle of the jaw : its duct terminates at d\ The sublingual, 

 ib. e, is more posteriorly placed than in Ungulates, and is in 

 contact with the submaxillary, of which it seems an accessory 

 lobe : its duct, f, has a similar termination at the fore part of 

 the fraenum linguae The zygomatic gland, ib. g, seems to be a 

 special development of part of the buccal system : its duct, h, 

 terminates behind that of the parotid, opposite the interval be- 

 tween the penultimate and last molars. The parotid is relatively 

 larger in the Cat, and more so in the Bear-tribe. 



