CONTENTS 

 Original Papers 



Page 

 Crystallography. — The classification of mimetic crystals. Edgar T. Wherry 



and Et-uoTT Q. Adams 153 



Botany. — Synopsis of the genus dchroma, with descriptions of new species. 



W. W. RowLEE 157 



Ornithology. — Diagnosis of a new genus of Bucerotidae. Harry C. Ober- 



HOLSER 167 



Abstracts 



Physics .' 169 



Spectroscopy 1 70 



Electricity . . . ^ 171 



Ceramic Chemistry 171 



Botany 172 



Phytopathology 1 74 



Proceedings 



Biological Society 1 75 



Scientific Notes and News 179 



