CONTENTS 

 Original Papers 



Pae< 



Chemistry. — Methods of gas warfare. S. J. M. Auld 45 



Botany. — Blepharidium, a new genus of Rubiaceae from Guatemala. Paul C. 

 Standley 58 



Zoology. — A key to the Philippine subspecies of Obba marginata with notes 

 on their distribution. Paul Baetsch 60 



Abstracts 



Geology 64 



Petrology 66 



Parasitology 66 



Proceedings 



Washington Academy of Sciences .- 67 



Anthropological Society 69 



Biological Society 73 



Philosophical Society 73 



SciENTiPic Notes and News 76 



