268 
ramosus.  Folia arcte imbricata, humida vix solita, subpungentia, 
oblongo-lanceolata, margine parce revoluta, apice denticulata; nervo 
erasso lutescente apiculata; cellulis basilaribus crasse marginatis 
subhexagonis luteo-diaphanis. Seta uncialis flavescente rubra, apice 
curvata, inclinata.  Theca parva sublongicollis pyriformis, nutans, 
intense brunnascens, opacå, operculo convexo apiculato sanguineo 
nitente; peristomium spectabile, dentibus exter. late lanceolåtis 
subulato-acuminatis, modice trabeculatis, linea media notatis; mem- 
brana interna pallida, cruribus carimatis brevioribus, scalariformiter 
pertusis, ciliis binis subulatis subæquantibus interjectis. — "Nr. 8516… 
Bryo erythrocarpo Schwægr. maxime affine, sed rigidius sub- 
pungens, foliis magis adpressis, peristomio et sexu diversum. 
57. Mnium rostratum Schwægr. — Nr. 7365. 
Ø, americanum. — Nr. 9090. 
58. Catharinea (Oligotrichum) Riedeliana Hpe. — Nr. 7439. 
59.  Polytrichum involutum n. sp. 
Bi-triunciale, laxe cæspitosum, basi nudiusculum, parce albido- 
fibrillosum; caulis patenti-foliosus, humore immutatus; folia e basi 
longe vaginante cuneata, cellulis inferioribus elongatis, superioribus 
rectangulis, diaphanis reticulata; lamina paulo longior lanceolata, 
dorso carinata, glabriuscula, margine arete inflexo, limbo mem- 
branaceo hyalino, cellulis rotundatis transverse reticulato, remote 
Serrato-dentato, acumine attenuato-aristata, parce spinuloso-dentata ; 
Mervo basi simplici, cellulis reetangulis formato, subdiaphano in 
lamina opaca lamelloso; fructus deficit. — Ad fontes fluvii Rio 
Preto; nr. 9074. 
Cum Polytrieho Antillarum ex habitu comparandum, sed foliis 
frecto-patentibus immutatis, nec humidis reflexis, dorso carinatis 
Blabris, margine - arcte inflexis complanatis, aqua imbutis, limbo 
u Membranaceo remote- serrato-dentato. diversum. 
60. Harrisonia (Hedwigidium) glyphocarpa nm. sp. 
Caulis adscendens biuncialis julaceus, plus minusve ramosus, 
' inferno fasens, superne lutescens, dense foliatus.  Folia undique 
