160 Transactions of the 



cornea of mammals by Arnold,* who, in 1862,t described also in 

 the conjunctiva of several mammals terminal networks of non- 

 medullated nerve fibres. Saemisch then amplified our knowledge 

 about the terminal network of non-medullated nerve fibres in the 

 cornea of mammals.^ 



Further we have to notice, that as regards the smooth muscular 

 fibres Kolliker made assertions about non-medullated nerve fibres 

 in the smooth muscular tissue of the urinary bladder of the frog ; § 

 according to Kolliker the non-meduUated nerve fibres form on some 

 places a network both in the muscular tissue as weU as on very small 

 arteries and veins. 



Then Auerbach described in the smooth muscular wall of the 

 intestine non-medullated nerve fibres forming plexus.jl After that 

 Klebs described networks of pale non-medullated nerve fibres in 

 smooth muscular tissue,ir and still later ** Arnold and His described 

 terminal networks of pale nucleated nerve fibres in the muscular coat 

 of large vessels. 



Beale's first assertion about a terminal network of non-medul- 

 lated nerve fibres refers to striped muscles, ' Philosophical Transac- 

 tions,' 1860, and therefore seventeen years after Kemak and one 

 year after Shaafhausen. Beale has been supported by Kolliker 

 (1862). 



About the capillary vessels Beale was the first and the only ob- 

 server who described non-medullated nerve fibres, which accompany 

 the vessel, bend round it, and join by lateral branches ;tt it is further 

 due to the truth to say that Beale is the only one who described 

 (and this was pointed out long before also by Klebs, Virchow's 

 'Archiv,' 1865, Bd. 32, p. 185) a real network of non-medullated 

 nucleated nerve fibres in the muscular coat of smaller arteries.Jt 

 Beale described (and illustrated by most beautiful illustrations) that 

 in the papillae fungiform as well as in the papillae fihform the non- 

 medullated nerve fibres form a plexus.§§ In the papillae fungiform 

 Beale is not quite sure whether the fine nerve fibres terminate 

 below the epithelium, or between its cells. 



We see therefore that the second stage of the doctrine of the 

 nerve termination (the first stage being this, that the medullated 

 nerve fibres bend round and back in loops), that is, the doctrine of 



* Heidelberg, 1860. 



t Virchow's ' Archiv,' Bd. 24. 



X ' Beitriige zur Anatomie des Auges.' Leipzig, 1862. 



§ ' Verliandhmgen der phisik. — medicin. Gestllschaft zu Wurzburg,' 1862. 

 1 Heft. January, p. 1. 



II ' Ueber einer plexus myentericus.' Breslau, 18G2, p. 12. 



H ' Centralblatt,' 18G8, No. 3G. 



*♦ Virchow's 'Aichiv,' Bd. 28. 



tt 'Philosoph. Trausact.,' 18G3, pi. Ix., figs. 44 and 47; and 1865, pi. xxii., 

 fig. 15. 



tJ ' Philosoph. Transact.,' 1863, p. 563, pi. xl., figs. 45 and 46. 



§§ Ibid., 1865. 



