400 



John F. Holm 



Gnn.ol Glomerulus olfactorius, 

 Gl.spr Ganglion centrale superior, 

 In Infundibulum, 

 iam.co??2.mes Lamina commissuralis mes- 



encephali, 

 Lob.ol Lobus olfactorius, 

 3f.C Motor cells, 

 M.c.N<^.II^».N.V Motor cells in the 



caudal motor root of the Trigeminus, 

 If.obl Medulla oblongata, 

 K. V Nervus trigeminus, 

 N.VIIa^ Nervus facialis rostral root, 

 K. VII^ Nervus facialis lateral root, 

 N. Villi Ramus anterior acustici, 

 N. VIlI^i Ramus posterior acustici, 

 N.Xs Sensory Nervus vagus, 

 iS^.X»» Motor Nervus vagus, 

 N.XII^ Sensory Nervus hypoglossus, 

 N.XII'" Motor Nervus hypoglossus, 

 N.prc Nucleus praetectalis, 

 N.r Nucleus rotundus, 

 N.l. V Nervus lateralis, 

 Nc.X'» Motor nucleus of Vagus, 



Nc.n.l. V Nucleus of Nervus lateralis, 

 Nuc. V^ Sensory root nucleus of the 



Trigeminus, 

 Nc.IokN. V and NcJi'n.K.V Rostral and 



caudal motor nucleus of Trigeminus, 

 Ol.c^ and Ol.ci^ Olfactory cells, 

 r.f Ramifying fibres of Acusticus, 

 Ram. con. Lob. olf Ramus connectens 



Lob. olf., 

 Ri. Villi Dorsal root of the Ramus 



anterior acustici, 

 R II. VIII I Lateral root of same, 

 Slrat.glom Stratum glomerulorum. 

 Sir at.gr is Stratum griseum, 

 T.C Trigonum cinereum, 

 Tr.F Trigeminal tracts, 

 Tr.V^ Sensory tract of Trigeminus, 

 Trac^.SM/Ä.epsTractusbulbo-epistriatici, 

 Tract. olf. hah Tractus olfacto-habenu- 



laris, 

 VIII and Vi"^ Veutriculi tertius and 



quartus. 



Fig. 8. 



Fig. 9. 



Fig. lU. 



Fig. 11. 



Fig. 12. 



Fig. 13. 



Fig. 14. 



Fig. 15. 



Fig. 16. 



Fig. 17— 



Sagittal section through the brain of Myxine along the median line. 



Half schematic. 20/1. 



Brain of Myxine. Transverse section through the third ventricle, 



Iron-haematoxylin. 250/1. 



Brain of Myxine. Horizontal section, rostral region. 20/1. 



Brain of Myxine. Sagittal section, region of fourth ventricle. 15/1. 



7. A series of horizontal sections through the brain of Myxine. Half 



schematic. 



Brain of Myxine. Transverse section. Ganglion interpedunculare. 



50/1, Haematoxylin preparations. 



Brain of Myxine. Rostral region. Golgi preparation. 35/1. 



Brain of Myxine. Horizontal section. Trigeminal region. Golgi 



preparation. 65/1. 



Medulla oblongata of Myxine. Transverse section. Golgi preparation. 



94/1. 



Medulla oblongata of Myxine. Transverse section. Golgi preparation. 



65/1. 



Medulla oblongata of Myxine. Horizontal section. Golgi preparation. 



94/1. 



Olfactory cells from Myxine. Golgi preparation. Apochromat 4 mm 



by Zeiss Comp. oc. 4. 260/1. 



Myxine. Cells from the Nucleus rotundus. Golgi preparation. 200/1. 



Sagittal section through the brain of Myxine a little laterally of the 



median line. Half schematic. 



21. A series of horizontal sections through the Medulla oblongata of 



Myxine. 15/1. 



