474 On Chemical Reaction in British Species of Pertusaria. 
7. P. dactylina (Ach.), Fellm. 144.  sidéum, Ach. Syn. 
C. Thallus K yellow, C reddish orange. 
8. P. bryontha (Ach.), Th. M. Fr. ET Fellm. 142; Arn. 108. 
9. P. melaleuca (Sm.), E. Bot. 2 
10. P. fallax om E. Bot. rai & 1529.  Thelotrema 
hymeneum, T. & B.! Lich. Br. 185. 7sidium lutescens, T. & 
B. 1 1. c. p. 87. 
D. Thallus K yellow, C crimson. 
11. P. gyrocheila, Nyl. in Flora, 1865, p. 354. 
E. Thallus K-—, C crimson. 
12. P. velata M E. Bot. 2062. Variolaria lactea, 
T. & B.! Lich. Br. 69; E. Bot. 2410. Variolaria aspergilla, 
T.«& B. i E Bot. 2401. Variolaria ey tar, T. 
oq Lie 55; É. Bot. 964. — Isidium. coccodes B, r ;1 
. e. 89 
F. Thallus K— , C. rose-colour. 
13. P. faginea (L.), E. Bot. 1718. Variolaria, T. & B. ! 
l. c. 64. Variolaria ilicea, Lyell!, MS. in Herb. Borrer. 
G. Thallus K—,C€C—. = 
14. P. ophthalmiza, Nyl.! Scand. 180. In Herb. Borrer at 
Kew is an lrish specimen labelled, in Dr. Taylor's hand- 
kg. P, constellata, Tayl., which appears identical with 
t 
I5. P. ius oe (Turn.), E. Bot. 2008 & 1714. es 
eri T. & B.! 1. c. 59. Variolaria discoidea, T. & B 
16. P. Hutchinsiæ Bor S Borr.), E. Bot. Suppl. 2652. 
Sur T. & B.! 
17. P. glomulifera, Bort Tight, Ang. Lich. 30, t. 11. f. 2. 
cas F Susila (Ach.), Leight. Ang. Lich. 30, t. 10. £ 4. 
19. P. leioplaca (Ach.). 
20. P. nolens, Nyl.! in Flora, 1864, p. 489. 
H. Thallus K brownish, C —. 
21. P Jortigiata M & Borr.).  Zsidéum oculatum B. 
Lou natum & 108. Variolaria polythecia 
"FIR Y" oo e 
k sublactea, Leight., n. sp. Variolaria lactea, in Herb. 
Bact “and plant spoken of in T. & B. Lich. Brit. p. 72. 
