Proceedings. ix 



William Palmer : The Type (?) of a New Old Species. 

 Sylvester D. Judd : Sexual Dimorphism in Crustacea. 



March 27, 1897 274th Meeting. 



The President in the chair and 30 persons present. 

 The following communications were presented : 

 M. B. Waite : Factors Governing Pear Blight.* 

 E. A. De Schweinitz : Some Methods of Generating Formal 

 dehyde and its Use as a Disinfectant/^ , 

 Theo. Holm : The Grass Embryo and its Constituents. % 



April 10, 1897 275th Meeting. 



Ex-President W. H. Ball in the chair and 31 persons present. 



The following communications were presented : 



Theo. Gill and C. H. Townsend : Diagnosis of Deep-sea 

 Fishes. (Read by title.) 



Jonathan Dwight, Jr. : A Species of Shearwater (Puffinus as- 

 similis Gould) New to the North American Fauna.|| 



Sylvester D. Judd : Antennal Circulation in Crangonyx. 



Charles T. Simpson : Notes on the Classification of Unios.^f 



H. C. Oberholser : The American Golden Warblers. 



T. Wayland Vaughan : Notes on a Monograph of the Eocene 

 Corals of the United States. 



April 24, 1897 276th Meeting. 



Ex-President W. H. Dall in the chair and 31 persons present. 



Edward L. Greene exhibited and commented upon specimens 

 of Viola emarginata and V. heterophylla. 



The following communications were presented : 



M. A. Carleton : Climate as an Element in Wheat Environ 

 ment. 



* Substance in article entitled ' Cause and Prevention of Pear Blight.' 

 <Yearbook U. S. Dept. Agric. for 1895, pp. 295-300, 1896. 



t Journal of the American Public Health Association, October, 1896 (in 

 part). 



J Am. Journ. Sci., iv, pp. 13-26, July, 1897. 



gProc. Biol. Soc. Wash., xi, pp. 231-234, September 17, 1897. 



|| Proc. Biol. Soc. Wash., xi, pp. 69-70, April 21, 1897. 



f Nautilus, xi, pp. 18-23, June, 1897. 



JI BIOL. Soc. WASH., VOL. XI, 1897. 



