XV111 
INTRODUCTION. 
allies in the dissepiments of the pores being thick and rounded, \ 
and the pores being continuous with the substance of the pileus 
and similar to it. Sc.lerodepsis resembles Trametes in some 1 
things, but differs in the pileus being scutate at the base, an dr 
the edges of the pores acute, and sometimes toothed. In 
Dcedalea the pores are sinuous and very irregular. Hexagoniat 3 
resembles Polystictus, with large hexagonal pores. These are'' 
angular and radiating in Favolus, but rather rhomboidal than j 
hexagonal. The substance is gelatinous in Laschia and Camp - 1 
bellia, but more waxy in Merulius. The pores are formed by I 
veins in Laschia and in some species of Merulius, but they aroti 
deep and sometimes toothed in Campbellia, which seems to be I 
stipitate, whereas the species of Merulius are sessile. Forothe- > 
Hum unites the Polyporei with tlio Hydnei, since the pores aro 
distant, and are practically perforated papillm. Solenia con- 
sists, in our opinion, of elongated cups, similar to Cyphella, to 
which it is really more closely allied than to the Polyporei. ’ 
The Hydnei are distinguished by the hymenium covering 
the outside of spines, warts, or papillm. In Hydnum the or ex- 
cesses aro spines or teeth, as they are in Tremellodon, but in the I 
latter the substance and structure approaches Tremella. In 
Sistotrema the processes aro flattened teeth, as they are in frpex i 
but m the latter connected at the base. Badulum has an i 
irregularly tuberculose hymenium, and Fhlebia is somewhat 
gelatinous, when living, with a corrugated hymenium. 
( Jrandtma , Odontia and Kneiffia are closely related, but in the 
first the hymenium is warted or granulose, with the warts 
obtuse ; m Odontia the warts are crested, and in Kneiffia there 
are no warts, but the hymenium is rough with rigid set®. 
In Thelephorei the hymenium is even, or nearly so, being at 
the most only velvety. Craterellus has a waxy hymenium : 
Lachnocladmm has the habit of a Clavaria, with a lateral 
hymenium ; Thelephora a soft hymenium, on one or both sur- 
faces, and the substance without any intermediate stratum 
the spores commonly globose, or nearly so, and often rough’. 
Cladoderns resembles Stereum rather than Thelephora, with a 
leathery pileus and a veined hymenium. Stereum is also 
leathery, with an intermediate fibrillose stratum, and an eves 
smooth hymenium In texture and general appearance 
Hymenochwte resembles Stereum, but the hymenium is velvety 
with minute rigid set®. Feniophora is also velvety, with 
warted, colourless set®, or processes resembling cystidia the 
texture and habit resembling Corticium. The little genus 
Aleurodiscus also resembles Corticium, but the form approaches 
Cyphella in being cup-shaped at first. The structure of the 
hymenium is peculiar from the presence of large, clavate 
nucleate basidia mixed with nodular paraphyses. Corticium is 
effused, with a waxy, smooth hymenium, and no intermediate 
stratum, and hyaline spores, whereas in Coniophora the spores 
