OF XEEYES DISTRIBUTED TO THE CAPILLARIES. 307 



of the "Quarterly Journal of Microscopical Science." 

 His specimens were prepared bj the gold process, and 

 give a diiFerent idea of the arrangement of the nerves 

 to that afforded by mine, some of which are ten 

 years old. I propose to restrict myself in this place 

 to the description of the facts I have succeeded in 

 demonstrating. Dr. Klein's memoir may be con- 

 sulted by referring to the " Quarterly Journal of 

 Microscopical Science," January, 1872, -while mine, 

 from which the following paragraphs have been 

 extracted, was published in the " Monthly Micro- 

 scopical Journal " of the same date. 



My own conclusions on the ultimate distribution of 

 nerve- fibres were formed several years ago, at a time 

 when terminal nerve networks were denied in Ger- 

 many, and when it was supposed that only in a few 

 exceptional cases did the axis cylinder of a nerve 

 extend beyond the white substance. Not only are 

 my networks of pale nucleated nerve -fibres now 

 accepted, but it is maintained that much finer net- 

 works of nerve-fibres ramifying upon and amongst 

 epithelial cells and other elementary parts, and even 

 upon an indi%'idual mass of bioplasm (nucleus), have 

 been demonstrated. At present, however, I cannot 

 regard the observations upon which it is desired to 

 establish this view, more conclusive than those which 

 a few years since led many to the conclusion that the 

 axis cylinder sprang from the nucleus or nucleolus of 

 the central nerve-cell. 



I have demonstrated that nerve-fibres are distri- 

 buted to capillary vessels in almost all the tissues of 

 the frog and newt. Among these textures I would 

 particularly mention the shin and mucous memhranes, 

 lung and kidney, the pericardium and fibrous membrane 

 near the liver, and the mesentei-y, as well as muscle and 

 nerve. 



The aerves distributed to capillary vessels are 

 much more difficult to demonstrate in mammalia, but 



