XVI BIOLOGICAL SOCIETY OF WASHINGTON. 



Mr. Galloway read a paper entitled RECENT PROGRESS IN 

 THE STUDY OF PLANT DISEASES. Discussed by Dr. Erwin F. 

 Smith. 



Dr. Frank Baker presented some NOTES ON DWARFS. Dis 

 cussed by Messrs. Ward, Gill and Riley. 



Mr. F. A. L/ucas read a paper, by Mr. Chas. Hallock, en 

 titled DISTRIBUTION OF FISHES BY UNDERGROUND WATER 

 COURSES.* Discussed by Dr. Gill. 



Mr. F. C. Test presented some NOTES ON THE DENTITION 

 OF DESMOGNATHUS. 



ONE HUNDRED AND SEVENTY-NINTH MEETING, 

 May 1 6, 1891. 



Vice-President Riley in the chair, and twenty-two members 

 present. 



Prof. Riley read a paper on THE MEXICAN ARROW WEED 

 AND JUMPING BEAN.f Discussed by Dr. J. N. Rose, Prof. 

 Ward, and Dr. Vasey. 



Mr. J. M. Holzinger read a paper entitled INCENTIVES TO 

 NATURAL HISTORY STUDY. 



Mr. Wm. Palmer described THE DISTRIBUTION OF CERTAIN 

 MAMMALS, BIRDS AND PLANTS ON THE PRIBYLOV ISLANDS. 



Dr. Vasey read some NOTES ON THE RECENT FIELD WORK 

 OF THE BOTANICAL DIVISION OF THE DEPARTMENT OF AGRI 

 CULTURE. 



Mr. Lucas presented some REMARKS ON A NEW TORTOISE 

 FROM THE GALAPAGOS ISLANDS. J 



ONE HUNDRED AND EIGHTIETH MEETING, 

 October 17, 1891. 



The President in the chair, and fifty-three members present. 

 Mr. W. T. Swingle was elected an active member of the 

 Society. 



* Amer. Angler. 



t Scient. Amer., June 13, 1891 ; Amer. Nat., July, 1891, pp. 673-675. 



I Nature, June 4, 1891, p. 113. 



