MEDULLA OBLONGATA OF AMBLYSTOMA 



389 



r. VILLI. v., radix lateralis facialis ven- 

 tralis 



r. VII. mot., radix motorius facialis 



r.VII.v.n., visceral sensory root of the 

 facialis 



r.VIII., radix nervi acustici 



r.VIII.d., radix dorsalis acustici 



r.VIII. v., radix ventralis acustici 



r.v.I.sp., first ventral spinal root 



7\X., radix nervi vagi 



r.X.l.l.d., radix lateralis vagi dorsalis 



r.X.l.l.v., radix lateralis vagi ventralis 



r.X.m., radix motorius vagi 



r.X.s.s., somatic sensory (general cuta- 

 neous) root of the vagus 



r.X.v.s., visceral sensory root of the 

 vagus 



r.X.^ to r.X.7, second to seventh roots 

 of the vagus 



s.y.R., substantia gelatinosa Rolandi 



S.I., sulcus limitans 



tect., tectum mesencephali 



tegtn., tegmentum 



tr.u., dorsal longitudinal tract of area 



acustica 

 tr.b., ventral longitudinal tract of area 



acustica 

 tr.b.sp., tractus bulbo-spinalis 

 tr.b.t., tractus bulbo-tectalis 

 Ir.cb.teg., tractus cerebello-tegmentalis 

 tr.lat.t., fasciculus lateralis telencephali 



(lateral forebrain bundle) 

 tr.rn.cb., tractus mammillo-cerebellaris 

 tr.sp.cb., tractus spino-cerebellaris 

 tr.sp.b., tractus spino-bulbaris 

 ti-.sp.t., tractus spino-tectalis 

 tr.t.b., tractus tecto-bulbaris 

 tr.th.b., tractus thalamo-bulbaris 

 tr.v.a., tractus visceralis ascendens 



(secondary gustatory tract) 

 t.v.q., taenia ventriculi quarti 

 ii.p., unipolar neurones of lateralis VII 



ganglion 



