SYMPATHETIC NERVES OF THE TEHRESTRIAL CARNIVORA. 



67 



being more frequent ; and it runs to the pharyngeal plexus where 

 it meets branches of the spinal accessory and sympathetic nerves. 

 The accessory filaments usually pass through the vagus, but in 

 Canis fmniliaris (1) they run separately. In Mungos ichneumon 

 (text-fig. 3 B) the pharyngeal nerve is given ofi" from a laryngeal 

 nerve. In Procyon lotor (text-fig. 3D) the pharyngeal nerve 

 communicates with the superior laryngeal nerve ; and in Mustela 

 martes (text-fig. 2B) and Civettictis civetta {text-Qg. 2 A) the sym- 

 pathetic communicates with it before it reaches the pharyngeal 

 plexus. 



Text-figure 2. 



X/. S.C.G 



IV. 



The upper cervical parts of the vagus and sympathetic nerves in : A. Civettictis 

 civetta; B. Mustela martes ; C. Meles meles; D. Anastomoses between 

 the recurrent nerves in Meles meles ; L.V. and R.V : left and right vagi; 

 d. and e : right and left recurrent nerves ; c : communicating nerves. 

 Other letters as in text-iig. 1. 



The superior laryngeal nerve (text-figs. \b, 2b, 3b) is the 

 largest branch given off from the ganglion nodosum, or from the 

 upper part of the vagus when no ganglion is present. In Mungos 

 ichneumon (text-fig. 3B) the superior cervical ganglion of the 

 sympathetic gives off" a large nerve (L-P-N.) which receives three 

 filaments from the ganglion nodosum, and supplies the pharynx 

 and larynx. The superior cervical ganglion, or sympathetic cord, 

 communicates in some cases with the superior laryngeal nerve 

 by small bx^anches, or by a thick cord, as in Canis thous 



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