CEREBELLUM OF URODELE AMPHIBIA 



19 



r.VII, radix nervi facialis 

 r.X, radix nervi vagi 

 s.a., stratum album 

 s.g., stratum griseum 

 s.L, sulcus limitans. 

 s.lat., sulcus lateralis rhombencephali 

 ted., tectum mesencephali 

 tr.b.t., tractus bulbo-tectalis (visceral 

 sensory?) 



vjn.a., frenulum veli 



tr.m.cb., tractus mammillo-cerebellaris 

 tr.sp.cb.d., tractus spino-cerebellaris 



dorsalis 

 tr.sp.cb.v., tractus spino-cerebellaris 



ventralis 

 tr.sp.t., tractus spino-tectalis 

 tr.t.b., tractus tecto-bulbaris et spinalis 

 tr.th.b., tractus thalamo-bulbaris 

 t.v.q., taenia ventriculi quarti 

 medullaris anterioris 



Fig. 1 A view of the right half of the medulla oblongata and cerebellum of 

 Necturus seen directly from above and drawn under the stereo-binocular micro- 

 scope. X 16. See the descriptions of figures 2 and 3. 



