, 111 



<ture ot' .'in!' 

 anticipated lli:it a dill'eienee , ,f i.]iini"ii was inijM.^ii, 



been for the fact that His ami K .^ UKMAK and 



oilier old"!- i-iiilu-;. ,,,;, I feel tpiite 



sure thai ha development of the Derm in Klasmo- 



l.rancliii with well preserved specimens could for a mom< '"tful 



<.n tlii- point." of the more reeent investigators VAN- \\Kii 



and l'.i:\i;i side with IJ.M.nu u. 



11 i:\vi \ ha-, taken an entirely <lii: n tin- <juestion of 



the origin >t the peripheral UTVHIS system, one which diller^ from 

 that of Ki i'l TF.R. His, ami K;*>i.i.iKi:it. as well a.s from tliat of 

 rvi.rM u. liu opposes the do-tiiu.- of the outgrowth of nerve-fibres 

 chirtly from ])liy>i..l-.^ical roi^i.l.-iMtioiLS. He can think of no 

 motive \vliii-h is capable of conducting the nerves that grow out 

 from the >|inal cord to iln-ir |>ro|...r t rrmiiiat ion> wiiich shall 

 (.HIM-, for example, the ventral roots always to go to muscles, the 



dona! rOOta to orpins that are ],{ mu-.-ular. and shall prevent 

 confusion taking place h,-t uven the i : is and those of the 



:iu>clos, between the branches of the tri^em inns and theacastu u- 

 or facialls, etc. Therefore HI:NM:\ maintains on theoretical grounds 

 that it is necessary to assume that "the nerves never grow o> 



MOfioftt, '"'' "/ ahoa >n with them.' 1 According 



to his view, which he endeavors to support h\ . the 



embryonic cells are for the most part united with on 

 means of fine connecting lilatm-nts. He maintains that when a 

 cell divides the connecting thr. -plits. and in this ma. 



there arises " an endless network of !i (Jut of these the nerve- 



are developed, while other parts of the network degenerate. 

 The reasons given by Jli NM\ we certainty \\.Mthy of great 

 attention. With further iviWtion on the subject they are easily 

 added to. If the nerves grow out to their terminal apparatus, \\\\\ 

 do they not take the mo>t direct course to their destination, why 

 are they often compelled to pur-ue eircuitou^ paths, and why do I 

 enter into the formation of complicated ple\uM of the greatest 

 variety.' \\ hence are the ganglionic cells that are found to be 

 developed in considerable numbers even in the periph ra! ne 



11 in diiterent orir.i! ally in the sympathet i In 



order to make progress in this ditlicult field the peripheral nervous 

 system // Jn^'ft^n-at.* must be taken into account more than it is 

 at present, and in tin- investigation of embryos not only series of 

 :ectioiisl.ut also other historical no ;s of 



