MAMMALIA. 



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man ; in the jaguar, there are three slender branches, one for the sterno-hyoideal 

 ruscle, another for the thyro-hyoideal, and the third, which is joined by the anterior 

 ink of the sub-occipital, to terminate on the sterno-hyoideal and sterno-thyroideal 

 luscles ; the sub-occipital, in passing down, forms a broad membranous attachment to 

 the ganglion of the par vagum. In the monkey, the descending branch combines with 

 the anterior trunk of the sub-occipital and the first and second cervical nerves, for the 

 muscles connected with the hyoid bone and thyroid cartilage; the same disposition 

 occurs in the baboon, except that the branch of the sub-occipital rather joins the first 

 cervical nerve, which at this spot gives off its branch to pass with the descending 

 branch of the ninth, and the one from the second cervical nerve. In the fox, the 

 descending branch is very small, being a mere filament ; it is joined by the anterior 

 trunk of the sub-occipital. The ninth afterwards supplies the stylo-glossal and genio- 

 hyoideal muscles, and then, as in the pig particularly, spreads out into a fan-like plexus 

 or retina, and passing between the two planes of the genio-hyo-glossal muscle, supplies 

 this and the lingual, and the delicately pectinated muscular structure forming the 

 surface of the tongue. In the porpoise the ninth arises from the outer side of the 

 jyramidal body ; it gives a branch to communicate with the sub-occipital and first 

 ervical nerves, to terminate on the large muscle of the throat that may be compared 

 rith the sterno-hyoid ; it then passes forwards and divides for the genio-hyoideal, the 

 stylo-glossal, the hyo-glossal, the genio-hyo-glossal, and lingual muscles, and com- 

 municates with the gustatory. 



The accessory nerve arises, as in man, principally from the spinal cord, but has 

 some fibrils from the involuntary centre near the origin of the par vagum ; it arises 

 Iso from the spinal cord and from the posterior bundles of several cervical nerves. It 

 Dasses out near the par vagum ; and in the goat, ass, pig, and jaguar, becomes united 

 ith this nerve ; and from both, filaments pass to form a cord to join the pharyngeal 

 plexus. In the fox, it joins the glosso-pharyngeal, the trunk of the par vagum, the 

 ninth and sympathetic ; it enters the sterno-mastoid muscle, to which it gives branches ; 

 it then communicates with the union of the anterior trunks of the first and second 

 cervical nerves, and with a branch of the third and one of the fourth, and terminates in 



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