510 DECADES OF FUNGI. 
Dead wood. Ceylon, dense forests at base of Adam's 
Peak. 
183. H. sulcata, n. sp. ; ungulata durissima; pileo badio- 
fusco concentrice sulcato ; poris magnis subhexagonis pro- 
fundis extus intusque ligneo-albis, dissepimentis lentis. 
(Tas. XX. f. 1.) 
On dead wood. Forests at base of Adam's Peak. Ceylon. 
Pileus ungulate, 3-4 inches broad, 2-3 inches long, ex- 
tremely hard and rigid, concentrically, deeply and regularly 
sulcate, sometimes zoned, but more frequently without zones, 
rather rugged, bay-brown, with a tawny tinge towards the 
margin, and sometimes on the disc. 
Substance thin, wood-coloured. 
Pores subhexagonal, very deep, 1 line in diameter, pale 
wood-coloured, cream-coloured within; dissepiments thick, 
rather flaccid. 
A splendid species, closely allied to Heragona Gunnii, Berk., 
but distinguished at once by the regular deep grooves of the 
surface. 
Tas. XX. Fig. 1. Plant; nat. size. 
*Stereum nitidulum, Berk. in Hook. Lond. Journ. of Bot. 
vol. 2, p. 638.— Gardner, n. 27 bis. 
On wood. Hautane, Ceylon. June, 1844. 
*Stereum lobatum, Gardn. n. 102. 
On living trees. Ceylon, Hautane Range. HE 4 
184. S. tenuissimum, m. sp.; pileo umbonato-sessili te- 
nuissimo dilatato fulvo-rubiginoso zonato fasciculato-villoso ; 
hymenio inæquabili luteo-rubiginoso. 
. .. On dead wood. Forests at base of Adam's Peak, Ceylon. 
. Pileus at first umbonato-sessile, laterally confluent, dilated, 
~ linch or more long, extremely thin and flexible, so that t 
. may be folded in any direction without breaking, tawny, - 
~ rubiginous, repeatedly zoned, clothed with coarse pubescence, — 
^ which is collected into little fascicles. ish E 
. . Hymenium unequal, rather yellower than the pileus. — 
. .. Nearly allied to Thelephora attenuata, Lév., Stereum luteo- — 
.. -badium, Kze, and some other similar forms, but distinct from — 
