POLYPOREI. 273 



Genus 17. XEROTUS (p. 227.) 

 1. X. degener, Fr. (p. 227} ; 1| in. 



Genus 18. TROG-IA Fr. 



Gills fold-like, edge longtitudinally channelled, or in the 



single European species, crispid. 



Reviving with wet. 



1. T. crispa, Fr. ; i x 1 in. Formerly placed in Cra- 

 terellus. 



= C. crispus, Fr. (p. 266). 



Genus 19. SCHIZOPHYLLUM (p. 228.) 

 ] . S. commune, Fr. (p. 228) ; 1 in. 



Genus 20. LENZITES (p. 228.) 



* On wood of deciduous trees. 



1. L. betulina, L. ; 1—2 in. Epping Forest. 



2. L. flaccida, Bull. 



* On wood of coniferous trees. 



3. L. sepiaria, Fr. ; 1—3 in. 



4. L. abietina, Fr. ; i in. x 12 in. 



Order 2. POLYPOREI (p. 229.) 



Genus 21. BOLETUS Fr. (p. 229.) 



Series i. Euchroi. — Tubes bright- coloured, commonly 

 yellow, not white or grey. 



A. Viscipellis. — PUeus covered with a viscous pellicle : stem solid, 

 not bulbous or reticulated with veins ; tubes adnate to tJie stem, 

 rarely sinuate, of one colour. 



1. B. luteus, Fr. (p. 229) ; 2-4 in. 



