Herrick, Cranial Nerves of Bony Fishes. 165 



supplies the trapezius muscle. It is apparently a viscero-motor 

 nerve. 



7. The n. lateralis z'^^/ terminates in the tuberculum acus- 

 ticum, crossing all of the other vagus roots without, however, 

 being connected with them in any way. It, however, receives 

 a small bundle of communis fibers from the IX root. The latter, 

 apparently go out with the first three or four branches of the n. 

 lateralis (the first of these being the r. supra-temporalis vagi), 

 accompanying the proper lateralis fibers, and ultimately anasto- 

 mose with the r. recurrens VII. 



8. The sensory IX is composed exclusively of communis 

 fibers. They enter the lobus vagi by way of the fasciculus 

 communis. Neither lateralis nor general cutaneous fibers are 

 received during any part of its course, nor is there any connec- 

 tion with any other nerve save the sympathetic chain and the 

 intra-cranial anastomosis with the root of the n. lateralis vagi 

 already mentioned. The IX nerve lacks the r. pre-trematicus 

 and the r. supra-temporalis. 



9. The motor IX arises from the cephalic part of the nu- 

 cleus ambiguus, runs for a considerable distance along the lateral 



lob. X. — The lobus vagi. 

 n. J. — The olfactory nerve. 

 n. II. — The optic nerve. 



r. cut. dors. X. — Ramus cutaneus dorsalis of the vagus. 

 r. intest. X. — Ramus intestinalis of the vagus. 

 r. lat. X. — Ramus lateralis of the vagus. 



r. oph. sup. V. — Ramus ophthalmicus superficialis trigemini. 

 r. oph. Slip. VII. — Ramus ophthalmicus superficialis facialis, 

 r. ot. — Ramus oticus. 

 r. pal — Ramus palatinus facialis. 

 r. rec. VII. — Ramus recurrens facialis. 

 r. St. X. — Ramus supratemporalis vagi. 

 r. VII p-t — Ramus pre-trematicus facialis. 



sp. V. /.—Spinal V tract (" ascending root of the trigeminus "). 

 t. a. — The tuberculum acusticum. 

 ^, Jini. — Truncus hyomandibularis of the facial nerve. 



t. inf. — Infra-orbital trunk, containing the r. mandibularis V, the r. maxil- 

 aris V, and the r. buccalis VII, together with communis fibers. 

 VIII. — The eighth nerve. 

 V. I. g. VII. — The ventral lateral line ganglion of the VII nerve. 



