358 BOTANY OF SOCOTRA. 



factus leviter fuscescens ; epitbecium obscure olivaceum v. virens, lamina virens. Sporse 

 octoiuu (simplices et hyalinae), 10-12 fi longae, 5-8 /x latse. 

 Tota prinio intuitu fere Lecanoram atram aut Physicam cegijalitam simulat, sed thallus ad 

 anibitum, ubi bene evolutus, clare effiguratus est. 



Socotra. Ad saxa quartzosa. B.C.S. n. 1402 pro parte. 

 Distmb. Endemic. 



2. P. (?) lanuginosum, Mull. Arg. 



Parmelia lanuginosa, Acb. Metb. p. 207. 

 Amphiloma lanuginosum, Nyl. Prod. p. 69. 



Pannariaz species ex forma et natura gonidiorum non est, forte juxta Placodium fulgens 

 locau da. 



Socotra. Ad saxa, sub fruticibus, tenui terra tecta prope Wacli Kischen, 

 alt. 650 m. (sterilis). Scliweinf. 



Distrib. Europe. Generically the plant is doubtful, its fruit being un- 

 known. Dr Nylander placed it in Amphiloma, near A. gossypinum, with which, 

 however, it has not any affinity. 



2. AMPHILOMA. 



Amphiloma, Korb. Syst. 110, Par. 47 ; Mull. Arg. Lich. Geneve 39 (uon Nyl.). 



Xantlwria, Th. Pries Arct. 67, pr. p. 



Placodium, Naeg. et Hepp, Fl. Eur. pr. p.; Tuck. Gen. 105, pr. p. 



A very natural genus, formerly known only in the northern hemisphere, 

 but containing several tropical and subtropical species. Our three species 

 are all new and endemic. 



1. A. deplanatum, Miill. Arg. in Proc. Roy. Soc. Edin. xi. (1882), 459. 



Thalli circa pollicem lati forma et magnitudo ut in A. Callopismate, Mass., sed totus miniato- 

 fulvus ut sa^pius in A. elegante, Korb. lacinise quam in ilia teuuiores, undique magis 

 eequaliter confluentes et magis adplanatce, imo ambitu magis adpressie et undique concolores. 

 Apotbecia paullo minora, ^-^ mm. lata, magis iunato-adpressa et discus cum margine 

 concolor. Spora3 12 /i longte, circ. 7 /i lata?. 



Species elegans, nulli nisi comparatte speciei affinis. 



Socotra. Ad saxa calcarea. B.C.S. nn. 1329, 1335. 

 Distkib. Endemic. 



2. A. Balfourii, Mull. Arg. in Proc. Roy. Soc. Edin. xi. (1882), 460. 



Tballus orbicularis, diametro £-1 cm. latus, medio demum simpliciter areolatus, marginem 

 versus late radiatim applanato-laciniatus, aurantiaco-fulvu3 v. nonnibil vitellino-fulvus, 



