XVII

ADDENDA.

p. 2. Note 2. The common usage of the words Pilz and Schwamm is notwithout exception j Nagel Schwamme , for example, is the common name ofAgaricus esculentus. See p. 118.

p. 7. The dry-rot in fir-built ships is caused by Merulius lacrymans , but inoak-built ships by Polyporus hybridus.

p. 10. Of the Orders mentioned in this page, Phragmotrichacei has beensuppressed altogether, and ASeidiacei has been substituted for Cceomacei, asaffording a more natural group.

p. 44. Much against my will, I am forced to adopt the genus Peronosporaas limited by Caspary, not by Corda, in consequence of the double fruit sodifferent from anything in genera allied to Botrytis , as far as they are atpresent known.

p. 59. De Bary believes that Asterophora is merely a conidiiferous state ofNyctalis; Tulasne however adheres to the older notion.

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

p. 252. After P. Vaillantii , insert—

77. P.Tiybridus, B. and Br.; white; mycelium thick, forming a densemembrane or creeping branched strings; hymenium breaking up into areae;pores long, slender, minute.—Boletus hybridus, Sow. t. 289, 387,/. 6.

On oak, in ships, etc. The Dry-rot of our oak-built vessels. This speciesseems hitherto to have been almost neglected by authors, the latter figure onlybeing quoted, which exhibits only a part of the characters.

p. 268. After Thelephora byssoides , insert—

13*. T. sebacea, Fr. ; effused, between fleshy and waxy, incrusting, atlength hard, various, tuberculated, or resembling stalactites, dirty-white; cir-cumference fringed. (Plate 17, fig. 6.)

On grass, etc. Common.

p. 309. After Cribraria intermedia , insert—

2. O. intricata, Schrad. On decayed fir-stumps. Weybridge, F. Currey .July, 1860.

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

p. 372. After Helotium ochraceum , insert—

21*. H. imberbe, Fr. On decorticated willow, A. Jerdon. Mossbumford,1860.

CORRIGENDA.

p. 13. For Hymenangium read Hymenogaster.

p. 81. For Polyporue igniarius read P.fomentariw v.

p. 87- For 13 read 10.

p. 91. For Plate 1 read Plate 3.

p. 231. For Flaphomyces read Scleroderma.