400 
DESCRIPTIONS OF THE PLATES. 
Dichomyces princeps Thaxter 
Fig. 11. Group of asci isolated by crushing. The three terminal asci show ascospores within 
and all arc adherent to the remains of the ascogenic ceU. Leitz ^ 2. 
Fei/ritschiella curvata Thaxter. 
Fig. 12. Antheridium at the right, showing terminal pointed slightly inflated receptacle into 
which the autherozoids are discharged from the cells just below it. Leitz oil ^ 4. 
Lahoulhenia elonrjata Thaxter. 
Fig. 13. Spore showing nuclei. -^2. 
Fig. 11. Terminal portion of perithecium showing structure of lip-cells (Ip), insertion of 
trichogyne (tr), and "valve" of posterior lip-cell (x). ^ 4. 
Fig. 15. Portion of fertile branch bearing an antheridium, its structure shown in optical 
section. -,'54. 
Fig. 16. Protoplasmic connections of the "stalk-cell" and basal cells of the perithecium 
indicating the successive origin of each. Drawn from a specimen in which the cells had been treated 
with potash and stained with eosin. The appendage lies at the left. J 2. 
Fig. 17. A specimen similarly treated and viewed from the opposite side. The appendage lies 
at the right. In both figures tlie stalk-cell is marked (p), the posterior basal cell (0'), the secondary 
stalk-cell (h), the anterior basal cells, left (g), right (d), and the four basal wall-cells of the peri- 
thecium (e, i, f, j), the cell (j) not being visible in fig. 17. J 2. 
Fig. 18. A specimen similarly treated, slightly crushed so as to separate the basal cells without 
destroying the ascus mass and the inferior supportirig cell, the protoplasmic connection of which 
with the secondary staltcell (h) is unbroken, as well as the connections of the two anterior basal 
cells with the parietal (pc) and wall (f, j) cells above them. The protoplasmic portions only of 
these cells are indicated, the lettering corresponding to that of the two previous figures, except that 
(is) represents the inferior supporting cell of the ascus apparatus, (am) the ascus mass and ascogenic 
cells, and (pc) the parietal cells of the perithecium. 
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