ADDENDA. 



p. 2. Note 2. The common usage of the words Pilz and Schicamm is not 

 without exception ; Na(/el Schwdmme, for example, is the common name of 

 Agaricus esculeiiitis. See p. 118. 



p. 7. The dry-rot in fir-built ships is caused by MeruUus laorymans, but in 

 oak-built ships by Polyporus hyhrklus. 



p. 10. Of the Orders mentioned in this page, Phragmotrichacei has been 

 suppressed altogether, and ^ckUacei has been substituted for Cmomacei, as 

 affording a more natural group. 



p. 41. Much against my will, I am forced to adopt the genus Peronospora 

 as limited by Caspary, not by Corda, in consequence of the double fruit so 

 different fi'om anything in genera allied to Botriftis, as far as they are at 

 present known. 



p. 59. De Bary beUeves that Asterophora is merely a conidiiferouB state of 

 NyctaUs ; Tulasne howcTer adheres to the older notion. 



p. 72. The best remedy, perhaps, is creosote. 



p. 252. After P. Vaillantii, insert— 



77. P. hybridus, B. and Br. -, white ; mycelium thick, forming a dense 

 membrane or creepuig branched strings ; hymenium breaking up into areae ; 

 pores long, slender, minute. — Boletus hybridus. Sow. t. 289, 387, y. 6. 



On oak, in ships, etc. The Dry-rot of our oak-built vessels. This species 

 seems hitherto to have been almost neglected by authors, the latter figure only 

 being quoted, which exhibits only a part of the characters. 



p. 268. After Thelephora lyssoides, insert — 



13*. T. sebacea, Fr. ,- effused, between fleshy and waxy, incrusting, at 

 length hai-d, various, tubcrculated, or resembling stalactites, dirty-white ; eir- 

 eumference fringed. (Plate 17, fig. 6.) 



On grass, etc. Common. 



p. 309. After Crihraria intermedia, insert — 



2. C. intrieata, Schrad. On decayed fir-stumps. Weybridge, F. Currey. 

 July, 1860. 



p. 368. I believe Peziza Oodroniana, Mont., is not distinct from P. tricolor, 

 Sow. 



p. 372. After Ilelotium ochraeenm, insert — 



21*. H. imberbe, Fr. On decorticated willow, A. Jerdon. Mossbumford, 

 1860. 



CORRIGENDA. 



p. 13. For Hymenangium read Hymenogaster. 



p. 81. For Polyporvs igniarius read P. fomentarina. 



p. 87. For 13 read 10. 



p. 91. For Plate 1 read Plate 3. 



p. 231. For Flaphomyces read Scleroderma. 



