CONTENTvS 



Original Papers 



Page 



Zoology. — A key to the Philippine operculate land mollusks of the genus Ceratopoma. 

 Paxjl Bartsch 510 



Zoology. — Marionella {Eurystoma IMarion, 1870) ; an emendation, with notes on a new 

 birefringent substance, marionellin, found in the intestinal cells. (Contributions to 

 a science of Nematology, XI.) N. A. Cobb 504 



Abstracts ^ 



Geology 510 



Hydrology 510 



Paleontology 511 



Ornithology 511 



Proceedings 



Philosophical Society 513 



Scientific Notes and News 515 



Errata ' .- 516 



Index to Vot,ume 11 517 



