** Spores 4-8 locular. 
(•Apoth. rounded or oblong, angular or difform. 
X On rocks. 
215. A. traehyljoides, Nyl. Thallus white, powdery. Apoth. 
superficial, rounded-diffbrm, convex, within dark. Spores ovoid, 
2-4 locular, .or0-14 by .004-5 mm - Reaction vinous red.— Arth., 
ft- 99 - A. lecideoides Th. Fr. Gen. Hcterol., ft. 97, A Inn/., ft. 31. 
Lecidea arthonioides Adi. Syn .. ft. 24. Trachylia Fr. L. F.. ft. 403, 
Kbr . Syst., ft. 300, Mass. Mem., ft. 117.—Rocks, and rarely on 
bark.—Europe. 
216. A. petrensis, Nyl. Thallus thin, white, uneven, rimulose. 
Apoth. brownish-black and blackening, rounded oblong, convex, 
now confluent, within pale. Spores ovoid, 4 locular, .014-16 by 
.005-6 mm. Reaction blue.— Flora 1876, ft. 309.—Silicious rocks, 
Hungary. 
217. A. myriocarpella, Nyl. Thallus greyish or ash-colored, 
subareolate or somewhat powdery, effuse, or evanescent. Apoth. 
brownish black and black, superficial, minute, rounded, plane or 
convex, within dark. Spores oblong-ovoid, 4 locular, .010-12 by 
.003-35 mm -—^r. N. Gr.,ft. 107.—On mica schist, Ireland. 
218. A. psimmytliodes, Nyl. Thallus thin, somewhat scat¬ 
tered. Apoth. minute, maculaeform, rounded-subangulose, plane, 
within pale. Spores oblong-ovoid, 4 locular, .015-18 by .006 mm. 
Reaction from blue vinous red.— Flora 1881, ft. 534. Exs. Lojka 
L. U., 11. 175 bis. —On sandstone, Hungary. 
219. A. serialis, Mull. Arg. Thallus white and yellowish-white, 
smooth or glebous-rugulose. Apoth. orbicular, and subangulose, 
often serially disposed, and then spuriously substellate, plano-con¬ 
vex, greyish-pruinose, torn at the circumference. Spores ovoid or 
oblong ovoid, 2-4 locular, the upper cell larger, .011-14 by .005-6 
mm.— Beilr., n. 1449, {non Graph. Fee. ft. 56.)—On rocks, Brazil. 
On bark or dead wood. 
220. A. mediella, Nyl. Thallus inconspicuous. Apoth. mi¬ 
nute, orbicular, convex, within dark. Spores oblong or fusiform- 
ovoid, 2-4 locular, .012-17 by .004-6 mm.; figured in Hepp., n. 509. 
Reaction vinous red. Spermatia .005-6 mm. long.— Scand., ft. 259, 
Lapp. Or., p. 167, Almq.,p. 30, Wain. II, p. 155. A. trabinella 
Th. Fr. Arct.,p. 240. A. musciginea Th. Fr. Bot. Not. 1865, ft. 
182, ft. ft. A. sordaria Kbr. Fg., ft. 269, fide A Inn/. Biatora 
globulosceformis Heftp. Exs., n. 509, fide Mull. Arg. Geneve, p. 71, 
