The Scottish Naturalist. 295 



caribus. Sporae Suae incolores ellipsoideae, simplices, .008- 

 .01 x .006-. 0075 mm. Axis centralis crassitudinis medio- 

 cris, pallidus ; fibrillar medullares compacts, K fl. dein 

 rufo-aurantiacae, serius ferrugineo-rubentes. 



In .Egypto prope Grand Cairo, lecta a U re Pinkerton. 



Usuea lurido-rufa (Strn.) requires additional description. 



Similis U. l/irtcz, rigida, pauci- sed divaricato-ramosa, lurido-rufa, 

 spinuloso - ramulosa, alt. 1 - 2 - pollicaris. Axis centralis, 

 tenuis ; fibrillar medullares laxe arachnoideae, K fl. dein 

 rubentes, I — . 



U. lurido-rufa (Strn.) 



* pallida subsp. no v. — Similis praecedenti sed thallo albido- 

 flaves-cente vel pallido-cinerascente. Sporae, .008-. 01 x 

 .006-0075 mm. 



Prope Carter River Australia (Carter). 



Usnea elegans sp. nov. described in Transactions of Royal 

 Society of Victoria (9th September 1880). The following is the 

 description there given. 



Thallus (K — C — ) pallide flavescens, teres firmus, erectus (altit. 

 1-2 pollicaris), parcissime divisus, interdum simplex et tunc 

 rigidus, undique densissime fibrillosus; axis medullaris gra- 

 cilis fere filiformis (K — C — ); apothecia concoloria vel 

 pallidiora, terminalia, plana (latit. 6-13 mm.), receptaculo 

 fibrilloso praesertim margine; sporae Snas incolores, ellip- 

 soideae vel late ellipsoideae, simplices, .0085-. on x .006-.00S 

 mm. Iodo erel. hym. intense caer. dein obscurata. 



Corticola in Gowrie Mountain, Darling Downs (coll. Bailey, 

 No. 13). 



Usnea consimilis sp. nov. — Similis prsecedenti sed humilior, ma- 

 gis compacta rami's nonnihil arcuatis ; axis centralis non- 

 nihil crassior et fibrillar medullares K fl. C fl. Sporae, 

 .009 .on x .006-. 007 mm. 



In Australia (Rev. M. Anderson). 



Usnea robusta sp. nov. — Thallus rigidus, robustus (crassit. basi 

 1-2 mm.) pallidus vel pallide cinerascens, divaricato-ramo- 

 sus, crebre fibrillosus (ut in hirta) et papilloso-asper ; axis 

 crassiusculus pallidus, fibrillae medullares compactae K — , 



