474 Proceedings and List of Papers read. 



(6) That these young nerve fibres originate within the old sheath, of 

 Schwann from the protoplasm and nucleus of the interannular seg- 

 ment. The spindle-cells formed from the protoplasm and nuclei of 

 the interannular segments elongate and unite to form protoplasmic 

 threads, with the elongated nuclei attached to their sides. The 

 central portion of the protoplasmic thread develops into the axis 

 cylinder, while myeline is deposited in drops in the protoplasm 

 surrounding the newly formed axis-cylinder. The protoplasm in 

 which the myeline is deposited remains with the nucleus as the neuro- 

 blast of the new interannular segment. 



(c) That so long as conductivity of the nerve is not re-established, 

 the development of the fibres proceeds only to a certain stage, and 

 as the new fibres three months and eighteen months subsequent to 

 division present identical characters, this stage may be regarded as a 

 resting stage, depending for its further development on re-establish- 

 ment of function. 



(d) That cicatricial intercalary segments reuniting the ends of a 

 divided nerve may be permeated by young fibres from end to end 

 without re-establishment of function, if the amount of cicatricial 

 connective tissue present in the mass is sufficient by its pressure to 

 prevent the passage of impulses. 



February 18, 1897. 

 The LORD LISTER, F.R.C.S., "D.C.L., President, in the Chair. 



A List of the Presents received was laid on the table, and thanks 

 ordered for them. 



% 

 The following Papers were read : 



1. " On the Iron Lines present in the Hottest Stars. Preliminary 

 Note." By J. NORMAN LOCKYER, C.B., F.R.S. 



II. " On the Significance of Bravais' Formulas f Dr Regression, &c., 

 in the case of Skew Correlation." By Gr. UDNY YULE. Com- 

 municated by Professor KARL PEARSON, F.R.S. 



III. " Mathematical Contributions to the Theory of Evolution. On 



a Form of Spurious Correlation which may arise when 

 Indices are used in the Measurement of Organs." By KARL 

 PEARSON, F.R.S.. University College, London. 



IV. "Note to the Memoir by Professor Karl Pearson, F.R.S., on 



Spurious Correlation." By FRANCIS G-ALTON, I .R.S. 



