Scand. 
CORRESPONDENCE. 153 
86. Physcia —— var. Haalin S is P. usta var. polycarpa, Ehr. 
91. coma crassa is S. érassa, f. melaloma, 
108. Leeani bibis i is Lecanora athrocarpa, Dub. ., saxicola. 
1408. pae metabolica.is Lecanora sophodes, var. teicophila, uen Spores 
0:023-27 millim. long, 0012-14 millim. broad. 
111, Lecanora atra. is LL. subfusca; var. coilocarpa, Ach. 
128, fuera varia, var, denigrata, is L. varia, var. sepincola, Ach., Nyl. 
Scandinay. p. 1 
.142. Psora fengin 1 is Lecidea Friessi; Ach. 
150. arde luteola, var. cesio-pruinosa, is Lecidea luteola, *poliena, aia 
4154. a sphaeroides is Lecidea sabuletorum, Flk. 
155. Bilimbia anomala is Lecidea tricolor, Wither., Nyl. Scand. p. 201. 
..162. Lecidea conglomerata is L. vernalis, Ach., f. corticalis, Nyl. Scand. 
p. 201. 
163. Mes minuta, is L. tenebricosa, Ach., Nyl. Scand. p. 201. Spores 
0:009—0:018 millim. long, and. 0:004 ki road. 
, M5. Taride aggregata is L: incineta, Nyl; Scand. p. 231. 
p Um Lecidea lapicida is L. Aser. Ach., Nyl. Scand. p. 226. 
.. 180. Lecidea contigua, var. confluens, is D. contigua, typieal enough. 
rn Buellia. coracina is Lecanora sophodes, var. levata, Nyl. Spores about 
0014 millim. long, 0:007 millim. broad. 
186. Buellia € is Poe ocellata, Flk. (Rinodina sulphurea 
Lénur, in Flora, 1858, p. 611.) 
194. Diplotomma calcareum is Lecidea seine Ram. 
.. 203. Opegrapha Chevalieri is O. confluens 
213. Opegrapha rubella is O. viridis, Pun Nyl. Scand. p. 256. 
cd and 216. Stenographa mies is Graphis sophistica, Nyl 
i . Arthonia astroidea, var. Swartziana, is A. ibis. £ obscura, Ach. 
od is D A. astroidea 1 
ni shales var: epipasta, is A. alni var. epipastoides, 
Nyl. Seas 
n 231. ea punctiformis i is Mycoporum miserrimum, Nyl. 
265. Pertusaria pustulata is P. leioplaca, Ach.” ; 
Now, Sir, in vindicating my own reputation as a lichenist, I trust you will 
permit me to reply, one by one, to these,alleged errors. 
l. Collema pulposum, Mudd. C. pulposum, var. fenaz, Ach... Probably 
correct. I place very little dependence on the colour of the thallus of C. ae 
posum, or of any its varieties. They are all more or less affected, both 
luxuriance and colour, by local circumstances: 
4. vedi tenuissimum, Mudd... L. spongiosum, Ny. There is no error 
here! A glance at the synonyms in the Manual, page 46, will show that I 
was quite aware that he regarded it as L. spongiosum. na gin "vs not Lichen spon- 
giosus, Sm. Eng. Bot. 1374, as stated. by him in his Syn. Meth. Lich. 119. 
af Al, 12, 16, 17, 18, 23, 24, 26. The whole of these are identical with au- 
ic specimens issued by Scherer, Hepp, and Leighton ; and if their names 
are M I am not answerable for them. 
