Proceedings. xxiii 



VERNON' BAILEY : i The Influence of the Cross Timbers on the 

 Fauna of Texas." Discussed by Mr. VAN DEMAN, Dr. MERRIAM, 

 Professor WARD, and Professor COPE. 



November 19, 1892. . 200th Meeting. 



The PRESIDENT in the chair and 24 persons present. 



COMMUNICATIONS. 



THEOBALD SMITH : " On Certain Minute Bodies (Parasitic ?) 

 Within the Red Blood Corpuscles." l Discussed by Dr. STILES, 

 Dr. REYBURN, and Dr. ERWIN F. SMITH. 



C. W. STILES : " The Topographical Relations of the Excretory 

 Canals of Cestodes." 2 Discussed by Dr. DALL and Dr. STILES. 



DAVID WHITE: "A New Walchia from New Mexico." Dis- 

 cussed by Professor WARD. 



F. M. WEBSTER (read by the Recording Secretary) : u Some 

 Entomological Factors in the Problem of Country Fences." 2 



F. V. COVILLE : " Comparative Values of Plants in Determin- 

 ing Floral Zones." Discussed by Dr. MERRIAM. 



December 3, 1892. 201st Meeting. 



The PRESIDENT in the chair and 26 persons present. 



COMMUNICATIONS. 



B. W. EVERMANN : " The Cruise of the U. S. Fish Commission 

 Steamer Albatross in Alaskan Waters in 1892." Discussed by 

 Dr. MERRIAM, Dr. GILL, Dr. DALL, Mr. TOWNSEND, and Mr. LUCAS. 



GEORGE VASEY : " Some New Grasses." Discussed by Mr. 

 DEWEY. 



J. N. ROSE : " On the Rediscovery of Certain Rare Plants." 



C. HART MERRIAM : " Exhibition of a Complete Series of the 

 Large American Ground Squirrels of the Subgenus Otospermoph- 

 itm" Discussed by Dr. GILL, Mr. COVILLE, and Dr. MERRIAM. 



B. E. FERNOW : " The Mathematics of Forest Growth." 



1 Theobald Smith and F. L. Kilborne : Investigations into the nature, 

 causation, and prevention of Texas or Southern cattle fever. Bull. No. 1, 

 Bureau of Animal Industry, U. S. Dept. Agriculture, 1893, p. 68. 



- Benierkungen iiber Parasiten 17. Ueber die topographische Anatomie 

 des Gefiiss systems in der Familie Tseniadre ; Centralblatt fur Bakteriol- 

 ogie und Parasitenkunde, vol. xiii, 1803, p. , figs. 1-12. 



3 Some entomological factors in the problem of country fences. Science, 

 vol. xx, Dec. 16, 1892, pp. :,37, 3:5S. 



