Proceedings. ix 



Mr. F. V. Coville spoke upon the CHARACTERISTICS AND 

 ADAPTATIONS OF A DESERT FLORA.* Remarks followed upon 

 the same subject by Messrs. Smith and Evans. 



Mr. C. W. Stiles discussed THE CAUSE OF MEASLY DUCK, f 

 exhibiting microscopic specimens of the disease and the para- 

 site causing it. The subject was further discussed by Messrs. 

 Merriam, Th. Smith, and Gurley. 



Dr. R. R. Gurley read a paper on NATURAL SELECTION AS 

 EXEMPLIFIED BY THE CACKLING OF HENS, which was dis- 

 cussed by Messrs. Lucas and Van Deman. 



Prof. J. W. Chickering spoke upon THE BOTANICAL LAND- 

 SCAPE.^: His paper was discussed by Messrs. Merriam and 

 Lucas. 



Two HUNDRED AND ELEVENTH MEETING, 

 April 22, 1893. 



The President in the chair, and thirty persons present. 



Mr. O. F. Cook presented NOTES ON THE NATURAL HIS- 

 TORY OF LIBERIA. Mr. Cook's communication was discussed 

 by Dr. Gill. 



Mr. J. N. Rose treated of Two TREES OF ECONOMIC IM- 

 PORTANCE FROM MEXICO. 



Dr. V. A. Moore made OBSERVATIONS ON THE DISTRIBU- 

 TION AND SPECIFIC CHARACTER OF THE STREPTOCOCCI GROUP 

 OF BACTERIA. | The subject was discussed by Dr. Th. Smith. 



*A chapter of botany of the Death Valley Expedition. Contributions 

 from the U. S. National Herbarium, Vol. ix, pp. 33-55, 1893. 



tNotes on Parasites 18 : On the Presence of Sarcosporidia in Birds. 

 <Bull. Bur. An. Indust., No 3, U. S. Dept. Agric., pp. 79-88, pis. ii-iii. 



^Science, N. Y., xxiii, pp. 118-119, March 2, 1894. 



\ A new Tabebuia from Mexico and Central America : Tabebuia Donnell- 

 Smithii. <Bot. Gaz., Vol. xvii, pp. 418-419. A new Bumdia from Mexico 

 (B. Palmeri). <Garden and Forest, vii, p. 195, 1894. 



([Observations on the Morphology, Biology, and Pathogenic Properties 

 of twenty-eight Streptococci found in the investigations of Animal Diseases. 

 <Bull. Bur. An. Industry, No. 3 (U. S. Dept. Agric.), pp. 9-30, 1893. 



