74 The Scottish Naturalist. 



DlGRAPHIS TRIX. 



408. arundinacea Trin., B. Common. 



Alopecurus L. 



409. geniculatus L., B. Common. 



410. pratensis L., B. Not uncommon. 



Phleum L. 



411. pratense L., B. Not uncommon. 



Agrostis L. 



412. canina L. Hoy Hill. 1880, B. 



413. alba L., B. Common. 



b. stolonifera. Sands in various places, H. 



414. vulgaris With., B. Common. 



b. pumila, B. Common. 



PSAMMA BEAUV. 



415. arenaria R. & S. Hoxa B. Sandy shores, Walls, Rothies 



holm, Sanday, &c, H. 



Phragmites Trin. 



416. communis Trin., Loch of Stennis, B. 



( To be continued.') 



NOTES ON THE GENUS USNEA, WITH DESCRIPTIONS 



OF NEW SPECIES. 



{Concluding paper. — Contd. from Vol. VI. p. 297.) 



By JAMES STIRTON, M.D., F.L.S.. 



Chlorea malacca sp. nov. — Thallus pallescens vel pallide lutescens 



vel ochroleucus, acute 1-3-costato-angulosus prsesertim truncis 



primariis et scrobiculato-rugosus, ssepe annulato-ruptus, acute 



et longe ramosus, ramulis creberriter et longe fibrilloso- 



attenuatis, pendulus, elongatus (longit. 1-3-pedalis) ; apothecia 



spadicea, sat magna (latit. 2-5 mm.), truncis primariis ple- 



rumque sita ; spora) 8me incolores, ellipsoideae, simplices, 



•oo6--oo85X'oo4--oo5 mm. ; paraphyses conglutinatse apicibus 



fuscescentes. Axis teres mediocris pullidus solidus, I caeru- 



lescens ; fibrillae medullares compactse, albffi, K — C — ; J — . 



Ad truncos arborum in Chili, altit. 5000 pedum (T. & J. King). 



Similar to CJi. Pccppi^ii, but differs in the spores, stems, &c. 



Only two or three detached bodies resembling spermatia have 



been detected, straight, cylindrical, -oo7--oo9Xcirc. '0007 mm. 



