Pl.cell.aph. 4. CENOTHALAMEAE. 117. Arthon. 479 
G. Spilomide^e. Thallus crustlike, flat, adnate; apo- 
thecia flattisb, irregular, not bordered. 
XXVII. 117. ARTHONIA. Acharius. Sprinkled-moss ^ 
Thallus crustlike, flat, expanded, adnate, uniform ; apo- 
thecia innate, sessile, roundish, not regular, not bordered, 
deep black, covered with a rather cartilaginous membrane ; 
parenchyme similar, solid. 
1. Arthonia Swartziana , Swartz sprinkled-moss .. 
Crust cartilaginous, membranaceous, whitish ; apothecia 
sessile, rather broad, slightly tumid, roundish, turned 
back, irregular, confluent, raised, dotlike, deep black. 
Arthonia Swartziana, Achar. in Schrader's Journ. 1, 3, 13 ; Engl. Bot. 
2079. 
On the bark of trees. 
2. Arthonia astroidea . Starred sprinkled-moss . 
Crust membranaceous, white, greenish-grey ; apothecia 
pressed to the thallus, flat, angular, rather starlike, irre- 
gular, deep black. 
Lichen astroites, Achar. Prod. 24. 
Opegrapha radiata, Persoon in TTster. Ann. 7, 29. 
Opegrapha astroidea, Acliar. Meth. 25; Engl. Bot. 1847. 
Arthonia radiata astroidea, Achar. Lick. 144. 
On the smooth bark of trees. 
3. Arthonia ohscura . Dark sprinkled-moss. 
Crust membranaceous, rather olive-colour ; apothecia 
small, flat, slightly concave, rather membranaceous, oval, 
elliptic, and kidneyshape, slightly sunk, wrinkled, deep 
black. 
Lichen obscuru?, Achar. Prod. 20; Engl. Bot. 1752. 
Opegrapha obscura, Achar. Meth. 22. 
Opegrapha reniformis, ylchar. Beth. 23. 
Arthonia obscura a and jS, Achar. Licit. 146. 
On the bark of trees. 
4. Arthonia lyncea. Lynx sprinkled-moss. 
Crust thin, rather tartarlike, even, rather cracked, white ; 
apothecia crowded, flat, slightly sunk, roundish oblong and 
bent, black with a grey hoar. 
Lichen lynceus, Engl. Bot. 809. 
Lecidea lyncea, Achar. Meth. 52. 
Arthonia lyncea, Achar. Lich. 147. 
On the bark of old trees. 
