36 



(December 12,1885.) 



J. M. Flint, U. S. Navy. — Exhibition of representative specimens of Fora mini fern 

 from the dredgings of the U. S. Fish Commission steamer Albatross. 



Romyn Hitchcock. — The Red Snow. 



W. S. Barnard. — Digestion ; environmental, etc. 



C. V. Riley. — The Mildews of the Grape-vine. 



C. Hart Merriam. — Description of a new subspecies of the common eastern Chip- 

 munk, Tamias striatus. 



(December 20, 1885.) 



C. Hart Merriam. — Contributions to North American Mammalogy. 1. The genus 



Tamias. 

 Frank H. Knowlton. — Multiplication in the Gyncccium of Datura stramonium, L. 



Otis T. Mason. — Mutilations of the human body. 



On January 1) and 23, 1886, the sixth annual meeting (eighty-seventh and eighty- 

 eighth regular meetings) for the election of officers was held. 



On February (!, 1886, the annual address was delivered by Mr. G. Brown Goode, the 

 president of the Society, the subject being "The beginnings of American Natural His- 

 tory." 



(February 20,1886.) 



Romyn Hitchcock. — Demonstration of the resolving power of a now one-Kixteenl h- 

 inch objective. 



D. E. Salmon and Theobald Smith.— On a new method of producing immunity 

 from contagious diseases. 



C. V. Riley. — A carniverous butterfly larva. 

 Lester F. Ward. — The Plane-tree and its ancestors. 



C. Hart Merriam. — Contribution to North American Mammalogy. 2. D< script ;>/n 

 of a new species of Aplodontia. 



George Vasey. — New and recent species of North American Grasses. 



(March 0, 1886.) 



GEORGE Vasey. — New and recent- species of North American Grasses. 



Charles Hallock. — Hyper-instinct of animals. 



W. S. Barnard. — Exhibition of a fungus, with remarks. 



H. G. Beyer, U. S. Navy— Remarks on Antipyretics. 



(March 20, 1886.) 



D. E. Salmon and Theobald Smith— Notes on some biological analyses of Poto- 

 mac drinking-water. 



H. G. Beyer, U. S. Navy— Remarks on Antipyretics. 



W. S. Barnard — Exhibition of a fungus, with remarks. 



Frank H. Knowlton — Additions to and changes in the Flora Columbiana for 

 1885. 



Frank Baker and J. L. Wortman — Recent investigations into the mechanism of 

 the elbow-joint. 



(April 3, 1886.) 



Frank Baker and J. L. Wortman — Recent investigations into the mechanism of 

 the elbow-joint. 



John B. Smith — Some peculiar secondary sexual characters in the Deltoids, and 

 their supposed function. 



C. Hart- Merriam — Contributions to North American Mammalogy. 3. Descrip- 

 tion of a new subspecies of Gray Squirrel. 



