Piper Betle LL. ........2.4..+.,. MLVII 
Plains of San Augustin, New Mexico, near 
Pee | CS a ke ee eg eee 
Plant remains from Bat Cave. . . . XLII-XLIV 
Pouteria Ucuqui Pires & Schultes . . . XX-XXIII 
Rapata modesta Maguire ........ =XXXI 
Rhytidanthera mellifera R. H. Schultes. . . VIII, X 
Roots isolated from post-glacial peat. . . . .. VI 
Sandia Valley and Ramospata Ridge (Dept. 
of Puno) Peru ........... ~XXXVII 
Solanum quitoense Lam. ...........3X 
Types of beeda used in pan-chewing . . . . . XLVI 
Vochysia lomatophylla Standl. . ...... =. VII 
ZeaMaysh. ............ .XLVIII 
[ xii | 
