432 I. DiscoLiCHENES (Wainio). [Eoccella 



demum convexa et sape etiam immarginata, lateralia. Sporse 

 fusiformes, 3-septat£e, long. 0015 ad 0-021, crass. 0-0045 ad 0-005 

 mm., leviter curvatse, decolores, apicibus obtusis. Medulla jodo 

 cEerulescens. F. dichotoma Ach. secimd. herb. Ach. apotheciis 

 sessilibus (non stipitatis) a f. subpodicellata differt. 



MosSAMEDES. — Ad rupes Oceani Atlantic! prope Oazimba (via 

 versus Cabo Negro). No. 406 pr. p. 



F. complanata Wain. 



Thallus longitudine circ. 15 ad 20 cm., ramis vetusfcioribus 

 circ. 4 ad 2 mm. latis, plus minusve compressis, ramis junioribus 

 anguloso-compressis, KHO non reagens, OaClsOj rubescens, esore- 

 diatus, rigidus. Medulla jodo csernlescens. Apothecia lateralia, 

 pruinosa, demum breviter stipitata. 



MossAMEDES. — Ad rupes Oceani Atlantic! prope Cazimba (via versua 

 Cabo Negro). No. 406 pr. p. 



"Formam cylindricam et complanatam non raro eadem in rupe 

 inveni " (Welw. in sched.). 



2. R. Africana Wain., n. sp. 



Thallus elongatus, long. circ. 20 ad 25 cent., basin versus crass, 

 circ. 1-5 ad 2 mm., livido-pallescens, leviter pruinosus, KHO 

 rubescens, CaOl202 rubescens, esorediatus, rigidus, ramis omnibus 

 teretibus aut ad axillas plus minusve compressis dilatatisque. 

 Apothecia lateralia, basi constricta, demum ssepe subpodicellata, 

 marginata, disco planiusculo, pruiiioso. Sporse long. circ. 0-024, 

 crass. 0-005 mm., rectse aut leviter curvatse, fusiformes, apicibus 

 ■acutis. Hymenium jodo non reagens aut passim levissime cseru- 

 lescens. Medulla jodo cserulescens. 



Bengijella. — Inter Roccellam ad portum Novo Rodondo adveotam 

 legit A. Lopes de Silva. No. 405. 



Reactione thalli a R. tinctoria et R. poi-tentosa Mont, differt, a poste- 

 riore etiam apotheciis basi constrictis. In R. portentosa et R. dubia 

 Darb. thallus neque KHO nee CaCljOj reagens, meduUa jodo cseru- 

 lescens. 



3. E.. hypomecha (Ach.) Nyl. in Hue, Lich. Exot. p. 60 ; Daib., 

 Mon. Rocc. p. 37. 



Var. isabellina Wain. 



Thallus esorediatus, opacus, teres, leviter pruinosus, pallescens 

 aut testaceus, neque KHO, nee CaCl202 reagens. 



MossAMEDES. — Ad rupes maritimas loco dicto Cazimba inter Mossa- 

 medes et Porto Pinda parce et aterilis. No. 404. 



R. dubia Darb. et R. Canarieitsis (Darb.) reactionibus solitis huic 

 variation! congruunt et habitu thalli parum ab ea difiEerunt, at thallo 

 epruinoso ab ea distinguuntur. 



Var. Benguellensis (Welw.) Wain. 



Thallus esorediatus, albus, neque KHO, nee CaOl202 reagens. 



MossAMEDES. — Ad rupes juxta Oceanum Atl. prope Cabo Negro. 

 No. 403. 



Apothecia demum sessilia, convexa, hemisphserica, basi leviter con- 

 stricta, margine simplice thallode albido. Hypotheciuni fuscofuligi- 

 neum. Sporse long. 0-020 ad 0-016, crass. 0-005 ad 00035 mm., rectiB 



