1921] 
BURT—TREMELLACEAE, DACRYOMYCETACEAE, AURICULARIACEAE 377 
composed of hyaline, even, thin-walled 
O hyphae 2 win diameter, very loosely 
interwoven next to the substratum and 
with occasional crystalline masses 6-12 y. 
; . . indiameter; granules minute, numerous, 
Fig. 1. H. microspora. Section : ie 3 
of fructification X 92; b, ba- protruding 60-90 y, containing an axile 
sidium, and s, spores, X 665. sheaf of slightly brownish hyphae and 
some incrusting granules; basidia longitudinally septate, 10-15 
x 6-12 u; spores hyaline, even, flattened on one side, 5-515 x 
314-4 y. 
The portions of fructifications received cover areas up to 
4 x 2cm. 
On decorticated, decaying, coniferous wood. Mexico. Janu- 
ary. 
Heterochaete microspora is distinguished by its floccose sub- 
iculum and thin hymenial layer, small spores, and occurrence on 
a coniferous substratum. 
Specimens examined : 
Mexico: Motzorongo, near Cordoba, W. A. & E. L. Murrill, 
990, type, and 995 (in Mo. Bot. Gard. Herb., 54617 and 54618 
respectively, and in N. Y. Bot. Gard. Herb.). 
H. Sheari Burt, n. comb. 
Sebacina Sheari Burt, Mo. Bot. Gard. Ann. 2: 758. text f. 2. 
1915. 
Type: in Burt Herb. and in Shear Herb. 
Fructifications resupinate, effused, adnate, coriaceous, with 
minute granules or papillae, dull white, drying pale olive-buff, 
cracked, the margin determinate, entire; in structure 110—140 u 
thick, with (1) a dense layer next to the substratum of longi- 
tudinally arranged, slightly brownish, even-walled hyphae 114- 
2 x in diameter, which branch and curve outward at a right 
angle and form (2) a fertile less compact layer 60-90 y thick, of 
suberect, flexuous paraphyses 3 v in diameter, of basidia about 
15-20 u below the surface, and of flexuous, cylindric-clavate 
gloeocystidia 40-45 x 6 y, not emergent above the surface; 
granules protruding 50-150 u, of about the same diameter at 
