VI BIOLOGICAL SOCIETY OF WASHINGTON. 



Dr. T. H. Bean presented Notes on Some Fishes from 

 British Columbia.* 



Dr. Merriam read a paper on the Evidence of Sonoran 

 Origin of the Flora and F'auna of the Gulf States. 

 Discussed by Messrs. Ward, Gilbert, Coville, and Dall. 



One Hundred and Fifty-seventh Meeting, 

 March 8, 1890. 



The President in the chair, and fort3'-one members present. 



Mr. B. T. Galloway read a paper giving the results of some 

 observations on an apple disease caused by the fungus Gym- 

 nosporanoitiDi macropus. I^iscussed by Messrs. Van Deman 

 and Marlatt. 



Mr. C. L. Hopkins presented some NoTES on the Animal 

 LIFE above the Snow Line on Mt. Shasta. t Discussed by 

 Messrs. Mann, Riley, Howard, Diller and Hasbrouck. 



Dr. W. H. Dall read a paper entitled On Dynamic Influ- 

 ences in Evolution. j: Discussed by Messrs. Coville, Mann, 

 Fernow and Ward. 



One Hundred and Fifty-eighth Meeting, 

 March 22, 1890. 



The President in the chair, and thirty-nine members present. 



Dr. C. H. vStowell was elected an active member. 



Dr. D. W. Prentiss read a paper entitled Change in the 

 Color of Human Hair,§ Change in the Color of Plum- 

 age OF Birds, and in the Fur of Mammals. || 



* Proceedings U. S. Nat. Mus., Vol. xii, pp. 641, 642. 

 t Insect Life, Vol. 2, p. 355. 

 X Proc. Biological Society, Vol. vi, pp. i-io. 



§ Phila. Med. Times, xi, 1880-81 ; also, Therap Gazette, Detroit, Mich., 

 1889, viii. 



llJournal Amer. Med. Assoc, xiii, 1889. 



