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 FAUNA 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 forty-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- 

 nosporangium macropus. Discussed by Messrs. Van Deman 

 and Marlatt. 



Mr. C. L. Hopkins presented some NOTES ON THE ANIMAL 



LIFE ABOVE THE SNOW L,INE ON MT. SHASTA. f Discussed by 



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



Dr. W. H. Dall- read a paper entitled ON DYNAMIC INFLU 

 ENCES IN EVOLUTION. | 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. Stowell 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. 

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

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



\ Ph.Ha. Med. Times, xi, 1 880-81 ; also, Therap Gazette, Detroit, Mich., 

 1889, viii. 



HJournal Amer. Med. Assoc. xiii, 1889. 



