138 



[July 15, 



Description of the figures. 



Fig. 1.— General view of venter of brain ; special reference to venter of 

 medulla, area post pontilis, showing relations of lines of origin-filaments 

 of NN. glosso-pharyngeus, vagus, and hypoglossus ; also ectal relations, 

 ventripyramis (vpy.), area elliptica (ar. el.), and the lateral tract (?). 



Fig. 2. — View of sinistral surface of brain, special reference to curved 

 line of origin -filaments of N. vagus and to origin line (L) ventrad, and 

 their relations ; the cephalic filaments of N. accessorius (XI) are in the 

 depression line ventral from Rf., while the caudal filaments have their 

 origin in the depression line lateral from O. 



Fig. 3. — Diagram to show the origin of N. vagus ventro-lateral to Rf. ; 

 also that N. accessorius (XI) has its cephalic filaments from the same de- 

 pression line, and its caudal filaments from the depression line ventro- 

 lateral to O ; N. hypoglossus (XII) is dorso-lateral to ar. el. 



Fig. 4. — Dorsal aspect of metencephalon (medulla) showing origins of 

 NN. IX, X, XI ; metaca?lia (mtc), dorsipyramis (dpy.), corpus resti- 

 forme (Rf.), oliva (O), and the lateral tract (?). 



Fig. 5. — To show relations of origin-fihxments ; of Rm. auricularis ; of 

 G. jugulare ; of G. petrosum ; of G. inferius. G. Ehreuritteri is removed 

 from its normal relation which is ectal to G. jugulare, and is placed 

 cephalad to expose the parts. N. XII, is reflected dorsad to expose origin 

 of N. pharyngeus and anastomotic' rasius from Pe. The dotted lines 

 represent NN. hyo-thyroideus and descendens noni. Px. phar. == 

 pharyngeal plexus. 



Fig. 6. is Fig. 5, dissected to show Rm. accessorius given to J., and the 

 second accession to the trunk peripheral to J. ; N. XII, is omitted as are 

 the anastomotic filaments of Px. gaugliformis ; the dotted line shows the 

 direction of the filaments from N. XI, to N. pharyngeus. 



Fig. 7. — N. larj'ngeus superior ; origin; division ; distribution of ental 

 or cephalic and ectal or caudal rami ; anastomotic relation between 

 pharyngeal ramulus of the ectal ramus and the oesophageal ramus of N. 

 pharyngeus. 



Fig. 8. — N. laryngeus inferior. To show the laryngeal relations of 

 N. laryngeus inferior ; entad of Ctl. thyroideus ; the palmate plexus ; the 

 anastomotic filaments of NN. laryngeus superior and laryngeus inferior ; 

 the pharyngeal ramus of N. laryngeus inferior (5°). 



Fig. 9. — N. laryngeus inferior sinister. To show its origin ; relations 

 with A. aorta and adjacent plexus ; relations of N. vagus with N. 

 sympathicus ; division of N. vagus dorso-caudad of root of lungs ; the 

 relations of the lateral and the mesal rami ; the dorsal and the ventral 

 pulmonary plexus ; the formation and the relations of the dorsal and the 

 ventral nerve trunks. 



Fig. 10. — N. laryngeus inferior dexter. To show its origin ; its relations 

 with A. subclavia ; relations of N. vagus with N. sympathicus. 



Fig. 11 and 13. — Tracheo-oesophageal ramuli of N. laryngeus •inferior 

 sinister and dexter respectively. 



Fig 13. — Distribution and relations of the ventral gastric nerve and the 

 ramus which terminates in the dextral G. semilunare of Px. Solaris. 



