Number 7 (December 31, 1953) 
Frederick Oliver Thompson, 1883-19538 
By Exso S. BAaRGHOoRN. ........ . . 178 
NuMBER 8 (February 19, 1954) 
Plantae Austro-Americanae IX 
By Ricuarp Evans SCHULTES. ..... .. .179 
Number 9 (July 12, 1954) 
Fossil Maize from the Valley of Mexico 
By Enso S. BarGHoorn, MarGarer K. WoLFE 
AND Katuryn H. Cuispy...... . . . 229 
A New Narcotic Snuff from the Northwest Amazon 
By Ricuarp Evans ScHULTES. ...... . 241 
The Origin and Possible Evolution of Sub-tassel 
Ears in Maize 
By WaLron C. GALINAT ......... . 261 
NuMBER 10 (November 26, 1954) 
On the Origin of Oats 
By Dexter R. Sampson .......... . 265 
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