534? 



THE 



/UPAL STAGE OF CULE]^, 



AN 



INAUGURAL DISSERTATION 



FOR THE 



DEGREE OF Ph.D. IN THE UNIVERSITY OF LEIPZIG, 



BY 



C. HERBERT HURST, 



Lecturer in the Victoria University, 



Assistant Lecturer in Zoology in the Owens College, 



Manchester. 



WITH ONE PLATE. 



MANCHESTER : 

 " Guardian " Printing Works, Blackfriars Street. 



1890. 



