52 
GERTRUDE E. DOUGLAS 
Plate II 
Hygrophorus miniatus (figs. 25-47) 
Fig. 25. X 30 diam. Young fruit body before any differentiation has taken 
place. The deeply stained elements are nutritive h^^phae. 
Fig. 26. X 30 diam. An older stage, which shows the differentiation of stem 
and pileus primordia. 
Fig. 27. X 192 diam. An enlargement of a fruit body, a little older than that 
of fig. 26, in which the primordium of the hymenophore is developing. 
Figs. 28 and 29. X 30 diam. A median and tangential section of a fruit body 
just beginning to form gill salients. The palisade layer has not yet developed an 
even surface. 
Figs. 30-34. X 30 diam. A series of sections showing young gill salients. 
Figs. 35-39. X 30 diam. A series of sections of an older fruit body, showing 
the gills. 
Figs. 40-42. X 30 diam. A series of sections from a still older fruit body. 
Fig. 43. X 209 diam. A portion of the surface of the pileus of the fruit body 
from which figs. 40-42 were taken. 
Fig. 44. X 209 diam. An enlargement of the section shown in fig. 28, from 
a fruit body which is forming gill salients before a definite even palisade layer is 
formed. 
Fig. 45. X 209 diam. An enlargement of the edge of a gill from the fruit 
body of fig. 41, An even palisade layer is now formed. 
Fig. 46. X 566 diam. A further enlargement of the preceding. 
Fig. 47. X 192 diam. An enlargement of the gill salients of the section shown 
in fig. 32. 
Plate III 
Hygrophorus nitidus (figs. 48-66) 
Fig. 48. X 31 diam. An early stage in which the pileus primordium is 
beginning to differentiate from that of the stem by the epinastic growth of the 
hyphae. 
Fig. 49, X 31 diam. A slightly older stage in which stem, pileus and hymeno- 
phore fundaments are distinguishable. 
Figs. 50 and 51. X 31 diam. An older stage, showing the primordium of the 
hymenophore further developed. 
Fig. 52. X 210 diam. A higher magnification of the section of fig. 50 showing 
the hymenophore primordium. 
Figs. 53-58. X 31 diam. A series of sections from a fruit body in which the 
gill salients are just beginning to form. The subadjacent tissue has become very 
loose. 
Figs. 59-63. X 31 diam. An older fruit body, showing the development of 
the gills. Notice the very loose character of the subadjacent layer and the very 
irregular gill surface. The deeply stained hyphae on the surface of the pileus make 
up the slime-producing layer. 
