25 
that while various ratios closely approximated Mendelian results 
Following the discussion of Dr. Harper, the top ic “The Bans 
W.A 
g i 
familiar example of this a and illustrates well the reviving 
‘resur. sie charac 
Decree: me sessile species now epee in Pleurotopsis and 
ly hairy the genus pa aS, 
the genus Marasmius as vat present limited contains about 140 
he ge 
known are extremely local. This may be partly due, however, 
to the lack of material. The species are in general so small and 
inconspicuous as to be overlooked by any one not especially 
interested in the group. Further collections are greatly desired 
from most parts of tropical America. 
Of the 84 species in our tro pics, 44 are described by Dr. 
ut one 
study of this kind involves good field notes when the material 
is collected, careful comparison with original specimens in this 
country and in Europe by one who knows -the group and its 
literature, and a knowledge of related groups to avoid duplica- 
tion. It further involves continual use 3 the microscope, a 
complete description of each species, and the taxonomic arrange- 
e genus Marasmius is one of a series of tough, reviving 
gill-fungi beginning with Si phyll ding with Lentinus. 
This series, together with Ge genus Russula, a the tribe Lac- 
