* 



DUBOG THE ^ CHALLENaEB ' EXPEDITION. 219 



cium granuloso-mapersa. lodo gelatina hymenialis bene caeru- 

 lescens, dein thecae violaceo-falvescentes. 



Species peculiaris comparanda cum X, Bermudensi^ sed mox 

 differens thallo alio, margiue thallino apotKeciorum subcrenato- 

 insequali, etc. Spermogonia non visa." — Nyl. in litf. 



On bark of trees : only a small fragment seen. (This species 

 evidently has nothing in common with L. varia.) 



9. Ueceolaeia scruposa *butophila, Ach, [=Z7. scruposa]. 

 On the ground, along with the barren thallus of Cladonia pyxi- 



data. 



saxicola 



11. L. ? ATBOBUUITN^EA (DC). 



On rocks : sterile and doubtful. 



FeeNANDO be NoEOIfHA. 



1. Lecakoba eecubajjs, Strn, 



On rocks ; well fruited. (This species is allied to Lecanora 

 hella^ Ach.). 



Bahia. 



1. Leptogittm tremelloides {AcJ}.). 

 On trees ? sparingly fertile. 



2. Paemelia peesulphueata, Nyl, "Subsimilis Farmelia 

 sulphurat(je, Nees et Plot., Nyl. Syn. p. 377, sed nonnihil minor, 

 thallo vix isidiosulo, subsoredioso, intus sulphureo-axireo, margi- 

 nibus lobulorum passim crenulato-incisis. Apothecia et spermo- 

 gonia ignota. Thallus K + ." Nyl. in Utt. 



On the bark of trees ; only a small fragment seen. Formerly 

 gathered in Louisiana, TucJc.y who does not distinguish it from P. 



sulphurata. 



Along witli this is the merest fragment of another ParmeUa^ 

 which externally resembles states of F. tinctorum, Despr., but 

 differs from this and all other known species by its peculiar 

 reaction, viz. " Medulla and eoredia K+, greenish black." The 

 fragment, however, is too miserable to admit of any right dia- 

 gnosis, though its unique reaction will render its identification an 

 easy matter. I purpose naming it P. adepfa^ Cromb., n. sp. 



3. Geaphis ArzELii (Ach)' 

 On bark of trees, very sparingly. 



