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,t 

 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. K. 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 Meetincx, 

 April 22, 1893. 



The President in the chair, and thirty persons present. 



Mr. O. F. Cook })resented Notes on the Natural His- 

 tory of Liberia. JNIr. Cook's communication was discussed 

 l)y 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. |I The sul)ject was discussed l)y Dr. Th. Smith. 



*A chapter of botany of the Death Valley Expedilion. <Contributions 

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



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

 <l>ull. Bm-. An. Indust., No 3, U. S. Dept. Agric, pp. 79-88, pis. ii-iii. 



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



§A new Tdhebula from Mexico and Central America : Tahehuia Dnnnell- 

 Sinlthii. <Bot. Gaz. , Vol.. xvii, pp. 418-419. A new Bumdiu from Mexico 

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



IJObservations 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. 



