CUVIER AND STRUCTURAL ZOOLOGY 69 



Leydig (1821-1908), in 1864, applied histology to 

 insects and other invertebrates. 



Virchow developed a line of abnormal histology 

 which figures now under the name Pathology. Thus 

 structural studies of the tissues under the microscope 

 have given rise to normal histology and abnormal 

 (pathological) histology or pathology. 



