PI. cell, aph. 4. CENOTHALAMEZE. 112. Rinod. 449 
a. Apothecia naked , black. 
1 . Rinodina atra. Black rinodine. 
Crust indeterminately formed, cracked, granular, warty, 
greyish white ; apothecia flat in the centre, afterwards 
slightly swollen, black ; thalloid border raised, free, at length 
bent and crenulated. 
Lichenoides crustaceum et leprosum, scutellis nigricantibus majoribus 
etminoribus, Dillen Muse. 133. 
Lichen tephromelas, Ehrh. Crypt . 
Lichen ater, Hudson FI. Angl. 530 ; Engl. Bot. 949. 
Parmelia atra, Achar. Meth. 154. 
Lecanora atra, Achar. Lich. 344. 
On stones, rocks, and the bark of trees. 
Thallus sometimes whiter, sometimes greyer; apothecia 
either very crowded, flat and then convex with the border 
not cut ; or varying in size, with the border crenate and 
bent. 
2 . Rinodina oculata. Eyed rinodine . 
Crust bald, nippled, branchbearing, black ; apothecia 
sessile, scattered, some slightly podicelled; centre rather 
concave, black, their proper edge at length bent ; thalloid 
border swollen. 
Lichen dactylinus, Wahl. Lapp. 414. 
Lichen oculatus, Dicks. Crypt. Brit. 2, 17. 
Isidium oculatum, Achar. Meth. 140 ; Lich. 576. 
Forming a crust on alpine mosses. 
3. Rinodina coarctata. Contracted rinodine. 
Crust diffuse, thin, cracked, slightly wrinkled, unequal, 
greyish; apothecia black, centre sunk, then raised, flat; 
thalloid border raised, bent in, irregular, contracted, pow- 
dery. 
Lichen coarctatus, Engl. Bot. 534. 
Parmelia coarclata, Achar. Meth. Lich. 158. 
Parmelia elacista, Achar. Meth. Lich. 159. 
Lecanora coarctata, Achar. Lich. Univ. 352. 
Oh stones and brick walls, 
4. Rinodina periclea. Shielded rinodine . 
Crust thin, nearly leprous and dispersed, whitish ; apo- 
thecia plano-convex in the centre, black, transparent, rough; 
thalloid border at the base, very small, powdery, becoming 
imperceptible. 
VOL. I. 2 G 
