THE CRANIAL GANGLIA IN AMEIURUS 



393 



Ep. PI. IV, Fourth epibranchial placode 



(second epibranchial placode of 



the X nerve). 

 Ep. PI. V, Fifth epibranchial placode 



(third epibranchial placode of 



the X nerve). 

 Ep. PI. VI, Sixth epibranchial placode 



(fourth epibranchial placode of 



the X nerve). 

 Ep. G. II, Second epibranchial ganglion 



(epibranchial ganglion of the IX 



nerve). 

 Ep. G. Ill, Third epibranchial ganglion 



(first epibranchial ganglion of 



the X nerve). 

 Ep. G. IV, Fourth epibranchial ganglion 



(second epibranchial ganglion of 



the X nerve). 

 G., Remnant of the lateral mass in the 



region of the lateralis IX ganglion. 

 Gass. G., Gasserian ganglion. 

 Gen. Com. X., General communis or 



visceral ganglion of the X nerve. 

 Gen. G., Geniculate ganglion. 

 J. G. X, Jugular or general cutaneous 



ganglion of the X nerve. 

 L. IX, Lateralis ganglion of the IX 



nerve. 

 L. G. X, Lateralis ganglion of the X 



nerve. 

 L. L. X, Lateral line nerve trunk of the 



lateralis X ganglion. 

 L. M., Lateral mass. 

 L. M. G. VII, Lateral mass ganglion 



(general visceral ganglion) of the 



geniculate. 

 Med., Medulla oblongata. 

 Mes., Mesoderm. 

 Mesec, Mesectoderm. 

 N. C, Neural canal. 

 Post PI., Postauditory placode. 

 Pre. PI., Preauditory placode. 

 R. X, Root of the X nerve. 

 R. Au., Root of the auditory nerve. 

 R. C. D. X., Ramus cutaneus dorsalis 



vagi. 



D. L., VII, Root of the dorso-lateral 

 portion of the lateralis VII gan- 

 glion. 

 Gass., Root of the Gasserian gan- 

 glion. 

 Gen., Root of the geniculate gan- 

 glion. 

 L. G. X, Lateralis root of the X nerve. 

 S. J, Ramus supra-temporalis J, 

 glossopharyngei, (Herrick, '01). 

 V. L., VII, Root of the ventrolateral 

 portion of the lateralis VII gan- 

 glion. 

 A. A., Ramulus acusticus ampulse 



anterioris. 

 A. E., Ramulus acusticus ampullae 



extrense. 

 L., Ramulus acusticus lagense. 

 N., Ramulus acusticus neglectus. 

 P., Ramulus acusticus ampullae pos- 

 teriori s. 

 Sac, Ramulus acusticus sacculi. 

 N., Ramulus acusticus recessus 

 utriculi. 

 T. Gass., Trunk of the Gasserian gan- 

 glion (supero-lateral strand of 

 Wright). 

 T. Gen., Trunk of the geniculate gan- 

 ganglion of the VII nerve (in- 

 fero-mesial strand of Wright). 

 T. V. L. VII, Trunk of the ventrolateral 

 portion of the lateralis VII gan- 

 glion (hyomandibular nerve). 

 V. L. VII, Ventrolateral portion of the 



lateralis VII ganglion. 

 X, Mass of cells of unknown origin and 

 whose fate is unknown, lying just 

 anterior to the first epibranchial 

 placode. 

 V. L. VII, Ventrolateral portion of 



the lateralis VII ganglion. 

 X, Mass of cells of unknown origin and 

 whose fate is unknown, lying just 

 anterior to the first epibranchial 

 placode. 

 Y, Ventral portion of the lateral mass 

 lying in the region of the IX and 

 X ganglia. 



THE JOURNAL OF COMPARATIVE NEUROLOGY AND PSYCHOLOGY, VOL 20, NO. 4. 



