A CYTOLOGICAL STUDY OF ARTIFICIAL 



PARTHENOGENESIS IN STRONGYLO- 



GENTROTUS PURPURATUS 



A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS 



FOR THE DEGREE OF DOCTOR OF PHILOSOPHY IN THE 



UNIVERSITY OF CALIFORNIA 



BY 



EDWARD HINDLE 



BERKELEY, CALIFORNIA 

 May, 1910 



