SIOLOGZ LJBB. 



NOTE. 



The study upon which this paper is based was carried on 

 under two grants of thirty-five and seventy-five dollars 

 each from the Emerson McMillin Research Fund, and the 

 expense of publication is met by the further aid of the 



same fund. 



WILLIAM R. LAZENBY. 



F. M. WEBSTER, 

 JOHN H. SCHAFFNER, 



Trustees. 



