276 KANSAS UNIVERSITY SCIENCE BULLETIN. 



paper were prepared by the author and inked in by Miss Mar- 

 garet Wise. The figures mentioned were made from wash- 

 drawings by Miss Wise. In conclusion, the writer desires to 

 thank Prof. S. J. Hunter for his kindness and help. Without 

 his interest and inspiration the work would have been a far more 

 difficult undertaking. 



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