4 CALlKOItXIA ACADKMV l>F SCIKXCES 



While pi-fpuring tliis report, sonie WH'eks were spent in examining. typical 

 specimens of forms in related groups. For favors in connection with the study 

 of such material, the writer would expi-ess his most sincere thanks to the follow- 

 ing gentlemen: Professor 8. W. Williston, Dr. \. Smitii Woodward, Dr. C. W. 

 Andrews, Dr. E. Frass, Dr. F. von Huene, I'rofessor E. Koken, Dr. Louis Dollo, 

 Professor Henry F. Oshorn, Dr. Lortet. 



V)ii rcrxiiil (if CdJ ifoniHt . 



Marrli, J! )().',. 



