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rotundatus, ad parten dimidiam superam coeruleus, 

 caeterum sordide albus, pruiíiulosus ; velum e stipite 

 descendeuti-adscendeas, pulchre molliterqiie gossypino- 

 sericeum, coeruleuní, saepe ob pilei viscositatem dif- 

 flueutem glutinosas, mox per aetatem evauescens. 



Hab. ínter muscos, hepáticas aliasque plantas tundrae 

 alpinae prope Port Cook, Staten island, Mart. 1882. 



05.S. Cutis pilei facile secedens; caro pilei tennis ex albo- 

 fuscescens, parum sub sectione mutabilis, conipactiu- 

 scula subexsucca ; illa stipitis corticalis fibrosa teuacella 

 \iolascens, interna subspongiosa alba. Odor saporque 

 nulli. 



46. CoRTiivARius {rnyxacium) russulariellus Speg. (n. sp.) 

 Diag. Delibutus, solitarius; pileus applanato-expansus 

 (2,5" diam.), laevissiraus, margine pulchre involutus, 

 inteíjer, albus, centrum \ersus roseo-oenocyanescens, 

 non hygrophanus, epidermide crassiuscula facile sece- 

 dente vestitus, umbone destitutus; lamellae primo 

 albae v. ceraceae, deiu pallide rubiginosae, autice atte- 

 nuatae subcircinatae, medio latiores, postice subatte- 

 nuatae, adnato-sinuatae, subcrassiusculae, acie minu- 

 tissime denticulato-serrulatae; stipes teres (3-4" long. 

 X 1" crass.), ad quartura superum anulo submucoso- 

 fluxili aegre perspicuo donatus, albus, non bulbosus, 

 supra anulum minute punctulato-substriatulus, caete- 

 rum laevis, ápice infero obtuse rotundatus, non v. \ix 

 radicatus, farctus. 



Caro pilei compacta ad marginem nulla centro parce 

 incrassatula, succosa, alba sub sectione fuscescens, 

 cum illa stipitis fibrosula continua, 



Basidia clavulato-pyriformia (15-18 X 5 ¡j,), hyalina, 

 3-4-sterigmatophora •, sporae ellipticae v. ovoideae, in- 

 ferné subangulato-acutatae, dense minuteque rugu- 

 loso-verruculosae (8x5 ¡j.), pulchre rubiginosae. 



