XXXIV BIOLOGICAL SOCIETY OF WASHINGTON. 



Mr. True announced that at the next meeting he would move 

 to reconsider the day of meeting of the Society. 



Mr. John A. Rvder made a communication upon The Prob- 

 able Origin and Homologies of the Flukes of Cetaceans 



AND SlRENIANS.* 



Saturday Lectures, 1885. 



The fourth course of Saturday Lectures, under the auspices 

 of the Biological Society and the Anthropological Society, was 

 begun February *j, 1885. The lectures were delivered in the 

 lecture room of the National Museum, and the following pro- 

 gramme was carried out : 



February 7 : Prof. John Fiske. Results in England of the 

 Surrender of Cornwallis. 



February 14: Dr. George M. Sternberg, U. S. A. Germs 

 and Germicides. 



February 28 : Hon. Eugene Schuyler. The Machinery of 

 our Foreign Service. 



March 7: Mr. William T. Hornaday. Natural History 

 and People of Borneo. 



March 14: Mr. Charles D. Walcott. Searching for the 

 First Forms of Life. 



March 21 : President E.M. Gallaudet. The Language of 

 Signs and the Combined Method of Instructing Deaf-Mutes. 



March 28 : President James C. Welling. Oldest History in 

 the Light of Newest Science. 



April 4: Mr. Frederick W. True. Ornithorhynchus ; a 

 Mammal that Lays Eggs. 



April 1 1 : Dr. A. L. Gimon, U. S. N. Sanitary Ignorance 

 among High and Low. 



April 18: Mr. J. S. Diller. A Trip to Mt. Shasta, Cali- 

 fornia. 



April 25 : Dr. D. E. Salmon. Our Invisible Enemies, the 

 Plagues of Animal Life. 



May 2 : Prof. T. C. Mendenhall. Weighing the Earth. 



1885. Amer. Naturalist, vol. xix (May), pp. 515-519. (Abstract). 



