1274 Wisconsin Academy of Sciences, Arts and Letters. 
Lister states that the middle layer of the peridium is an aggre¬ 
gation of yellow vesicles intermixed with the peripheral ends of 
the capillitium, the inner layer homogeneous, pierced by the eap- 
illitium threads: he gives the diameter of the threads as 6 to 20/* 
or more, and speaks of their having numerous blunt-ended free 
branches. 
Massee gives as the diameter of the sethalia 3-9 cm. He calls 
the tubes of the capillitium rather scanty, 4-5/x thick, slightly 
rugulose or with indistinctly raised bands. 
The specimens which I have are from 2-3.5 cm. in diameter, 
brownish-grav, surface shining, under the hand lens showing reti¬ 
culations. The spores agree with Maebride’s measurements, 
5—6 ( u. I find them faintly reticulate and colorless. The capilli- 
tium is distinctive and would separate it at once from the Reti- 
cuiarias or Enteridiums, with which it might be confounded. The 
capillitium thread is very broad in places, even 45/*, in others as 
narrow as 6/*; it is irregular, branched, wrinkled, minutely 
warted, with blunt ends. It resembles the capillitium of L. exi- 
guum except in width. The color under the microscope is pale 
yellow. The figures given in Lister, PI. LXXV., A, are correct 
for the capillitium as I find it. 
This species does not seem to be common; our eight specimens 
are from Madison, collected in September, 1901, and November 
16, 1894; one group of three aethalia growing on dead maple 
bark. 
Lycogala exiguum Morg. 
1893. Lycogala exiguum Morg, Jour. Gin. Soc. } p. 134. 
Morgan: “iEthalia small, globose, gregarious, the surface dark 
brown or blackish, minutely scaly, irregularly dehiscent. The 
wall thin; the vesicles with a dark polygonal outline, disposed in 
thin reticulate patches, which are more or less confluent. The 
tubules appear as an interwoven fibrous stratum upon the inner 
membrane: they send long slender branched extremities inward 
among the spores. Spores in mass pale ochraceous, globose, 
nearly smooth, 5—6/* in diameter. Growing on old wood. Hiltha- 
lium 2-5 mm. in diameter, the threads 2-10/* in thickness, with 
very slight thickenings of the membrane. The polygonal vesi- 
