57 
344 - A. subilieina, Leight. Thallus ash-colored, bordered by a 
dark line. Apoth. rounded and variously difform, depressed-con¬ 
vex, bordered by a thin, white, mealy margin. Spores linear-obo- 
vate, muriforin, at length brown, the extreme cells larger.— Ceylon , 
p. 181 , and l, 36./. 28. — Ceylon. 
345 - A. cinerasceus, Kph. Thallus white or pale ash-colored, 
powdery, bordered by a black line. Apoth. emergent, scattered, 
rounded, oblong-difform, elliptical, angulose, and polymorphous, 
here and there concave, scabrous, now obsoletely bordered by a 
thalloid margin. Spores 1-2, muriform, .046-48 by .019-22 mm.— 
Flora 1876 , p. 482.—Brazil. 
346. A. picila, Mass. Thallus glaucescent, effuse, bordered by 
a dark line. Apoth. macular-difform, erumpent, numerous, scabrous. 
Spores ovoid, or oblong-ovoid, muriform, the upper cell much larger, 
•° 33 ~ 3 b by .020-22 mm.— Kph. Aniboin., p. 8.—Amboina, Africa. 
347. A. oasis, Mass. Thallus thin, white, bordered by a black 
line. Apoth. innate-sessile, minute, macular-difform. Spores ob¬ 
long-ovoid, muriform, brown. — Kph. Amboin., p. 8. — Amboina. 
348. A. cinereo-argentata, Kn. Thallus thin, smooth, shin¬ 
ing, glaucous, continuous, subdeterminate. Apoth. numerous, in¬ 
nate, lirellate, indistinctly stellate or difform. Spores 4 locular, or 
the two terminal cells again unevenly divided, linear, constricted, 
the ends acute, .050-60 by .006-7 nun.— Shirley 1889, p. 150.— 
Australia. 
Of the following, belonging to this section, the descriptions have 
not been seen : 
A. albata, Nyl. Arlh., p. 93 (nomen.) Peru. 
A. Beccarianum, Beltr. Giorn. Soc. Bot. Ital. 1875 , p. 202.—Italy. 
A. hysterellum, Mass. Catagr. , />. 654.—Brazil. 
A. melanospila, Anz. Symb. 1868,/. 21.—Italy. 
A. rosacea, Anz. Long, exs ., n. 435.—Italy. 
A. violascens, FI. Lich. Capens.,p. 23.—Cape of Good Hope. 
The following are to be excluded from Arthonia: 
A. ctesio-pruinosa, Fee Suppl., p. 36= Graphis fide Midi. Arg. 
Graph. Fie. p. 49. 
A. cembrina, Anz. Long., n. 207, and Rab. L. E., n. 726, so far 
as my specimens show, is a Pyrenula. 
A. ceracca, Fee Ess.,p. 50, and A. Jobstiana, Fee Snppl., p. 
37 = Graphis scalpturata ,fide Mull. Arg. 1. c., p. 49. 
A. con linens, Fie Ess., p. 55 = Graphis confluens Fee (non Nyl.) 
and Lecanactis F6eana ,Jide Mull. Arg. 1. c.,p. 45. 
