888 



C. JUDSON HERRICK 



DESCRIPTION OF FIGURES 



All lisurcs arc drawn from preparations of larvae of Ainblystoma tigrinum and, 

 except where otherwise expressly stated, each figure is drawn from a single prepa- 

 ration and is not a composite from several sections. All of the Golgi sections 

 figured are taken from specimens of larvae of about the age of the one modelled or 

 older. In the figures of Golgi preparations the boundary between the gray and 

 the white layers is indicated by a heavy broken line. 



REFERENCE LETTERS 



a.nc, area acustico-lateralis 



Aq., aquaeductus Sylvii 



b.p., bipolar neurones of lateralis VII 

 ganglion 



hr.conj., brachium conjunctivum 



cb., cerebellum 



c.cb., corpus cerebelli 



col.v., columna ventralis grisea 



com.cb., commissura cerebelli (medul- 

 lated component) 



coni.cb.L, commissura cerebelli (lateral 

 unmeduUated component) 



com.i.s., commissura infima Halleri 

 (somatic component) 



com.i.v., commissura infima Halleri 

 (visceral component) 



dec.veli, decussatio veli 



em.cb.v., eminentia cerebellaris ven- 

 tralis 



etn.s.t., eminentia subcerebellaris teg- 

 menti 



cm. v., eminentia trigemini 



f.d.l., fasciculus dorso-lateralis 



f.l.m., fasciculus longitudinalis medi- 

 alis 



f.l.m.VI., tract from area acustico- 

 lateralis to VI nucleus 



f.sol., fasciculus solitarius 



g.V., ganglion of V nerve 



hyth., hypothalamus 



Im., bulbar lemniscus (from area acus- 

 tico-lateralis) 



lob.au., lobus auricularis rhomben- 

 cephali 



lob.vis., lobus visceralis 



M.c, Mauthner's cell 



tnes., mesencephalon 



M.f., Mauthner's fiber 

 n.IV., nervus trochlearis 

 n.IX., nervus glossopharyngeus 

 yi.m.t., nucleus motorius tegmenti 

 n.sp.l., first spinal nerve 

 nuc.amb., nucleus ambiguus 

 nuc.f.sol., nucleus of fasciculus soli- 

 tarius 

 nuc.mes.V., nucleus mesencephalicus V 

 nuc.IX.m., nucleus motorius IX 

 nuc.p.t., nucleus posterior tecti 

 nuc.V.m., nucleus motorius V 

 nuc.VI.m., nucleus motorius VI 

 nuc. VII. m., nucleus motorius VII 

 nuc.X.m., nucleus motorius X 

 n.V., nervus trigemini 

 71. VI., nervus abducens 

 n.VII+VIII., nervi facialis et acus- 



ticus 

 pl.c, plexus chorioideus 

 r.IX.mot., radix motorius IX 

 r.l., recessus lateralis rhombencephali 

 r.l.l.VII., radix lateralis facialis 

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

 r.p.m., recessus posterior mesenceph- 



ali 

 r.V., sensory root of the V nerve 

 r.V.mes., radix mesencephalica V 

 r.V.vies.d., descending fibers of radix 



mesencephalica V 

 r.V. mot., radix motorius V 

 r.VI., radix abducentis 

 r. VILLI. , radix lateralis facialis 

 r. VILLI. d., radix lateralis facialis 



dorsalis 

 r.VII.LLm., radix lateralis facialis 

 medius 



