Bates of Publication of the Several Parts of this Volume. 



Pakt XVII. pp. 1-224, was published Dec. 1890. 



„ XVIII. pp. 225-448 „ J«li/ 1892. 



„ XIX. pp. 449-072 „ Sept. 1893. 



„ XX. pp. 673 to end „ April 1894. 



