MourrRIiLL: PHILIPPINE POLYPORACEAE 475 
ovoid, smooth, hyaline, 4—5 # long, hyphae hyaline, 3-5 p; 
cystidia none. 
Type collected on the Lamao River, Luzon, 115 m., on dead 
deciduous wood, December, 1903, by R. S. Williams. 
Trametes Williamsii Murrill, sp. nov. 
Pileus sessile, dimidiate, subimbricate, at times laterally con- 
nate, applanate, thicker behind, 4~5 x 4-7 x 1 cm.; surface finely 
tomentose to nearly glabrous, slightly zonate, isabelline or avel- 
laneous, sometimes partly murinous, anoderm, slightly tubercu- 
lose ; margin thick, sterile, entire, easily bruised: context corky, 
tough, somewhat zonate, white, 5-7 mm. thick, eagerly devoured 
by insects ; tubes pallid, 5 mm. long, tough, firm, mouths circular, 
regular, pallid, 2-3 to a mm., edges thick, obtuse, entire: spores 
globose, smooth, hyaline, 4-5 #; hyphae hyaline, 3-4 p; 
cystidia none. 
Type collected at Santa Cruz, Gulf of Davao, Mindanao, on 
dead pine logs, June, 1905, by R. S. Williams. 
Tyromyces Elmeri Murrill, sp. nov. 
Pileus fleshy, rigid and fragile when dry, dimidiate, sessile, 
subimbricate, 2-3 x 3-4 x 0.2-0.3 cm.; surface rough, with mi- 
nute tubercles and pits, glabrous, white to isabelline; margin 
rather thick, entire, concolorous: context white, fleshy-tough, 1 
mm. thick ; tubes white to isabelline within, 2 mm. long, mouths 
slightly angular, minute, regular, 6-7 to a mm., pruinose, glisten- 
ing, at length avellaneous, edges thin, entire: spores globose, 
smooth, hyaline, 3-4 #4; hyphae hyaline, 4-5 ; cystidia none. 
Type collected on Mt. Mariveles, Luzon, on dead wood, No- 
vember, 1904, by A. D. E. Elmer, xo. 6954. 
Subfamily FOMITEAE 
Amauroderma Elmerianum Murrill, sp. nov. 
Pileus stipitate, umbonate-affixed, subcircular to reniform, usu- 
ally convex above, plane or slightly concave below, hard and 
rigid, 3 x 4-7 x 0.5—I cm.; surface thinly encrusted, finely puber- 
ulent, conspicuously radiate-rugose, many times sulcate, marked 
with narrow, avellaneous lines and broad, fuliginous or black 
zones ; margin thick, truncate, zonate, crumpled or rugose, con- 
colorous: context avellaneous, punky-corky, homogeneous, 2-4 
mm. thick; tubes 3-7 mm. long, slender, avellaneous within, 
mouths regular, circular, constricted, 5-6 to a mm., nearly white 
to smoky-black, reddish-brown when bruised, edges thick, obtuse, 
entire: spores subglobose, very pale brown, finely echinulate, 
