OBSEllVATIONS ON STRUCTURE OF CELLS AND NUCLEI. S39 



between the two kinds of cells lies merely in the distribution 

 and amount of these fibres ; in the connective-tissue cells 

 of the mesentery of newt the fibrillar substance forms a 

 considerable portion of the whole cell, being present in a per- 

 ceptible amount around the nucleus and extending from 

 here in all directions as the branched processes : in the cell- 

 plates of the nerve-fibres, on the other hand, there is no 

 appreciable collection of that substance around the nucleus, 

 and the fibres extend apparently only in the two opposite, 

 or at most three directions. This last fact is easily accounted 

 for, considering that th(i cell-plate of the nerve-fibre is 

 doubled round this latter, and consequently must be without 

 processes at least on one side, .^e., the margin of the fold. 



It is easily understood that the intranuclear network of 

 the cell-plate of a nerve-fibre is in connection with the pro- 

 cesses and intranuclear network of a neighbouring connective- 

 tissue corpuscle — a fact which I observed in the instance 

 figured in 23 of Plate XVI. 



It is not at all improbable that the assertions of a connec- 

 tion of minute nerve-fibres with the processes of connective- 

 tissue corpuscles — too well known in the literature of the 

 cornea — are to be explained in this manner. 



