460 Structure of Pearls. Cerebral Lesions. [Mar. 28 y 



Field. Part 2. 8vo. [Harrislurg 1888]; Atlas, Eastern 

 Middle Anthracite Field. Part 2. 8vo. \_Harrislurg 1888]. 



The Survey. 



Wellington : Statistics of the Colony of New Zealand. 1887. 

 Folio. Wellington 1888; Reports of the Mining Industries. 

 1888. Folio. Wellington. 



The Government of New Zealand. 



Zurich: Schweizerische Meteorologische Central -Anstalt. Annalen. 

 1886. 4to. Zurich [1887]. The Institute. 



March 28, 1889. 

 Professor G. G. STOKES, D.C.L., President, in the Chair. 



The Presents received were laid on the table, and thanks ordered 

 for them. 



The following Papers were read : 



I. "The Structural Arrangement of the Mineral Matters in 

 Sedimentary and Crystalline Pearls." By GEORGE HARLEY, 

 M.D., F.R.S. Received March 6, 1889. ' 



[Publication deferred.] 



II. " On the descending Degenerations which follow Lesions of 

 the Gyrus marginalis and Gyrus fornicatus in Monkeys." 

 By E. P. FRANCE. With an Introduction by Professor 

 SCHAFER, F.R.S (from the Physiological Laboratory, 

 University College, London). Received March 9, 1889. 



(Abstract.) 



This paper contains a minute account of the descending degenera- 

 tions which have been observed to make their appearance in the lower 

 portions of the central nervous system, as the result of artificially 

 established lesions of parts of the cerebral cortex. The work has been 

 carried out by Mr. France with material supplied by the researches 

 of Professor Horsley, Dr. Sanger Brown, and Professor Schafer, 



