THE NERVOUS SYSTEM OF AMPHIBIA 



307 



G.oph., the ganglion of the ophthalmi- 

 cus profundus 



G.VIII, the ganglion of the auditory 

 nerve 



G.Vis.IX, the visceral ganglion of the 

 glossopharyngeus 



G.Vis.X, the visceral ganglion of the 

 vagus 



h, the postbranchial division of the first 

 ramus branchialis vagi 



L.o.p.V, the lateral terminal branch 

 of the ophthalmicus profundus 



L.L.VII, lateral line fibers of the facial 

 nerve within the brain 



L.L.VII, Asc, the ascending divisions 

 of the lateral line root fibers of the 

 facialis 



L.L.VII,Des., the descending divisions 

 of the lateral line root fibers of the 

 facialis 



L.L.IX,X, the lateral line root fibers 

 of the glossopharyngeus and vagus 

 within the brain 



L.L.IX,X,Asc., the ascending divi- 

 sions of the lateral line root fibers of 

 the glossopharyngeus and vagus 



L.L.IX,XJ)c-'^., the descending divi- 

 sions of the lateral line root fibers of 

 the vagus 



M, myotome, the third in figures 1 to 4 



Mdb.V, ramus mandibularis trigemini 



Mes., mesenchyma 



M.o.p.V, the mesial terminal branch of 

 the ophthalamicus profundus 



Mx., ramus maxillaris trigemini 



Neu. II, neurones of the second order 

 in the reflex circuits 



Nuc.vis.ni., the visceral motor nucleus 



Olf., the olfactory organ 



Op.St., the optic stalk 



o.p.V., the ramus ophthalamicus pro- 

 fundus 



P.L., the pigment layer of the retina 



R.G.G., root of the Gasserian ganglion 



R.G.Jug., root of the jugular ganglion, 

 or the somatic sensory root of the 

 vagus 



R. L.L.VII, the lateral line root of the 

 facialis 



R.L.L.IX,X, the lateral line root of 

 the glossopharyngeus and vagus 



R.M., the root mass, a collection of 

 chiefly indifferent cells about the en- 

 trance of the nerve roots into the 

 brain 



R.oph., the root of the ophthalmicus 

 profundus 



R.V., root of the trigeminus 



R.V,ni., the motor root of the trigemi- 

 nus 



R.VII,m., the motor root of the facialis 



R. VII, vis., the visceral sensory root of 

 the facialis 



R.VIII, the root of the auditory nerve 



R. Vis. IX, the visceral sensory root of 

 the glossopharyngeus 



R.Vis.X, the visceral sensory root of 

 the vagus 



R.X,nt., the motor root of the vagus 



R.XI, the spinal accessory root, or the 

 most caudal motor root of the vagus 



t. a dorsal liranch of the ramus oph- 

 thalmicus profundus 



Tr.Asc.V, the ascending trigeminal 

 tract 



Tr.Dcs.V, the descending trigeminal 

 tract 



Tr.S, a tract in the motor zone, prob- 

 ably bulbo-spinal 



r, ncrvus trigeminus 



VC, the somatic motor neurones of the 

 ventral column 



]'//, nervus facialis 



VIII, nervus acusticus 



VT, the somatic motor tract 



X, nervus vagus 



