ERRATA 
page 5, line 28 
for 48 read 58 
page 36, lines 7 and 8 
for C. Schweinfurth read C. Schweinfurth 
page 43, line 31 
for in equal pairs read in unequal pairs 
page 45, line 14 
for caudida read candida 
page 55, line 7 
for Corymborchis read Corymbis 
page 57, line 2 
for fig. 4 read fig. 3 
page 57, line 18 
for 614 read 618 
page 64, line 4 
delete cum 
page 8 
delete lines 20 and 21 
page 149, line 27 
for aromatica read aromaticus 
page 155, lines 25 and $1 
for Summerhays read Summerhayes 
page 155, line 31 
for (1917) read (1927) 
page 156, line 14 
for aromatica read aromaticus 
page 165, line 15 
for Waldt. read Waldst. 
page 166, line 20 
for Archangeli read Arcangeli 
page 246, line 7 
for resevoir read reservoir 
page 274, line 11 
for papillato-puberuli read papillato-puberulae 
page 280, line 4 
for Mechrowit read Mechowii 
page 2838, line 12 
for this read his 
page 301, line 26 (footnote) 
for Caldasia 1 read Caldasia No. 4 
[ xxvi ] 
