CONTENTS 



Original Papers 



Page 



Geology.— New geologic formations in western Wyoming. Eliot Black- 

 welder .' 417 



Botany. — Omiltemia, a new genus of Rubiaceae from Mexico. Paul C. 



Standley 426 



Zoology.-^Opalina and the origin of tlie ciliate Infusoria. Matnard M. 



Metcalf 427 



Zoology.— Synopsis of the supergeneric groups of Rodents. Gerrit S. 



Miller, Jr., and James W. Gidlet 431 



Abstracts 



Geography \ 449 



Geology 450 



Technology 456 



Proceedings 



Washington Academy of Sciences 457 



Botanical Society 457 



Entomological Society 459 



Scientific Notes and News 460 



