— 159 — 



Hab. Ad folia dejecta sternata Fagi betaloidis in sylvis, 

 Staten islancl, Mart. 1882. 



Obs. Pileiis subconvexus (6"'diam.), glaberrimus, centro 

 umbilicatus, margine integer siibrepandulus, 10-12- 

 striatus, striis utrinque subbifidis, siibcarneis, ceterum 

 albus, tenui membranáceas ; lamellae tenacellae par- 

 vulae pohmacriae, longiores marginem aequautes , 

 antice acutiusculae, postice subdilatatulae, subsinnatae, 

 anulatim connatae, albae; stipes füiformis (3" long. X 

 0,5'" crass.), rigiduliis, erectas, fistalosas, totas casta- 

 neas, sericeo-nitens, basi incrassatalus, insititias, gla- 

 berrimus. 



57. Makasmius (rotula) aadrosacels Fr. 



Yar. Ushuvaiensis Speg. 



Diag. A typo recedit statura veré majore, stipiteque 

 breviore sabflexnoso atque nonnihil crassiore. Pileus 

 fulvo-carneus ambita paüescens, membranáceas ( í" 

 diam.), leniter radiatim striato-plicatulus; lamellae 

 paucae distantes, albae, saepe \enoso-connexae ; stipes 

 castaueus, laevissimas (2-2,5" long. X 1-1,5"' crass.). 



Hab. In cortice patrescente trancoram in sylvis prope 

 Ushuvaia, Maj. 1882. 



58. Marasmius {rotula) AisTARCTicus Speg. (n. sp.) 



Diag. Solitarias; pileus hemisphaerico-campanulatas 

 (5-8"' diam.)_, non umbilicatus, candidas, tennis subpel- 

 lucidns, primo laevis, dein 16-20-salcato-racliatus, 

 sulcis utrinque bilidis, margine rectus, integer, acutus ; 

 lamellae tenues, dimacriae, cymbaeformes, antice acu- 

 tae margiuein pilei attingentes, postice rotundato-si- 

 nuatae stipite adpressae, candidae ; stipes teres füiformis 

 (3-4" long. X 0,5'" crass.), glaberrimus, ad tertium 

 superum candidus, ceterum rufescenti-castaneus, opa- 

 cus, llexilis, non rigidus, basi insititius. 



