NuMBER 7 (April 28, 1952) 
Medullosa Olseniae: A Permian Medullosa from 
North Central Texas 
By Davin C. Roperts anp Enso S. BARGHOORN 191 
NuMBER 8 (May 29, 1952) 
Studies in the Genus Micrandra I 
By Ricuarp Evans SCHULTES. ....... . 201 
Noumser 9 (November 10, 1952) 
Plant Remains from a Peruvian Mummy Bundle 
By MarGaret AsHLEY TowLE ..... . . 228 
NuMBER 10 (December 12, 1952) 
Studies in the Genus Hevea V 
By Ricuarp Evans SCHULTES. ........ . 247 
Studies in the Genus Hevea VI 
By Ricuarp Evans SCHULTES. .... . ... . 255 
[ vi ] 
