STRUCTURE AND DEVELOPMENl’ OF REISSNER’s FIRRE. 4l 
Text-fig. 4. 
nr. tci.mes. 
/ 
Diagrams representing the cellular connections of Reissner's 
fibre in the brain, A, according to Houser (’01) ; B, according to 
Sargent (’04). ch.ux. Cerebellar axons of the “Dacbkern” 
cells, cbm. Cerebellum, fhc. hub. lieis. Constituent axons of 
Reissner's fibre' derived from cells in the habenular ganglia . 
/i«6. Ganglion habenula;, vr.tect. mes. Neurons of the 
Tectum mesence)) ball. p.c. Posterior commissure, pr.opt. 
Processes (dendrites) of the " Dacbkern" cells ending amongst 
the fibres of the T r a c t u s o t i c u s. r.f. Reissner’s fibre, r. n . 
Cells of the " Dacbkern ” or roof nucleus, s.m.p. Stratum 
medullare profundum. tr.op. Tractus opticus, tr.lh. 
let. Tractus thalamo-tectalis. tr.tct.cbm. tractus tec- 
talis cerebellaris. tr. tct.fbr. R. Tractus tectalis fibrse 
Reissneris. 
