PROCEEDINGS. 27 



Sixth Meeting, February ii, 1881. 



The President occupied the chair, and thirty-seven members were 

 present. 



An hour was devoted to the completion of the discussion of the 

 presidential address, Messrs. White, Ward, King and Gill taking 

 part. Dr. J. H. Kidder, U. S. N., exhibited a series of photo- 

 micrographs of objects obtained floating in the air of Washington. 

 He also exhibited photo-micrographs of the dry rot fungus from the 

 U. S. Steamer " Portsmouth," after its infection by yellow fever, of 

 spores of various organisms collected in the yellow fever hospitals 

 of Cuba, and of blood corpuscles from patients affected by various 

 febrile diseases.* 



Seventh Meeting, February 25, 1881. 



Prof C. V. Riley, V. P., occupied the chair and thirty-two mem- 

 bers were present. 



Prof Riley read a paper entitled The Fertilization of Yucca. f 

 Dr. C. A. White gave an account of a collection of fossils, includ- 

 ing 1500 species, duplicates of the celebrated collection of James 

 Hall, State Geologist of New York, recently received by the 

 National Museum from the American Museum of Natural History 

 in New York. Mr. Frederick W True read a paper entitled 

 SucroRiAL Prehension in the Animal Kingdom.J 



Eighth Meeting, March ii, 1881. 



The President occupied the chair, and thirty-four members were 

 present. 



In discussing Mr. True's paper on "Suctorial Prehension" Prof. 



* 1S81. Kidder, Jerome II. Report | on ] an examination | of the | exter- 

 nal air of Washington | by J. H. Kidder, M. D., | Surgeon, U. S. Navy. | | 



[Extracted from the Report of the Surgeon General | of the Navy for i88o.] | 



I Washington: | Government Printing Office. | 1882. | 8vo., pp. 22 -|- i 



(-|- i), 10 plates. 



f 1881. Riley, Charles V. Further notes on the Pollination of Yucca and 

 on Pronuba and Prodoxus. <^Proceedings of the American Association for the 

 Advancement of Science. 18S1, Vol. XXIX, Part II, pp. 617-639, figs. 1-16. 



X To be published in the proceedings of the U. S. National Museum. 



