M\ 
42 
circa zy. zs'y9 «UNC. metientibus levibus rufescentibus; inflores- 
centia synoica, antheridiis paucis minutissimis, paraphysibus nullis? 
South America, Spruce ; with Ephemerum equinoctiale, Mitt. De- 
tected and communicated by Dr. 7. P. James,@ Smaller than even 
Mmegalosporum. Remarkable for its very narrow, erect, nerved 
often subsecund leaves, with the apex often abruptly bent down- 
wards; reticulation about as in Ephemerum serratum. Calyptra 
and spores the smallest of the genus. Capsula dark colored. 
2. Gymnostomum tophaceum, n. sp.—Dioicum; magnitudine 
adspectuque, G. curvirostri ; Czspite inferne fusco tophaceo, caule 
apice parum fasciculato-ramoso, foliis in siccis apertis leniter tortil- 
ibus madefactis recurvo-patulis ligulato-vel oblongo-lanceolatis sub- 
carinatis utrinque minutim papillosis, margine latiuscule recurvis 
haud decurrentibus, apice plerumque obtusis (aliis valde obtusis aliis 
acutiusculis), superne minutissime confertim inferne laxiuscule 
subpellucido areolatis, costa mediocri subterreti paulum infra apicem 
evanida, perichetialibus subconformibus erectis semivaginantibus, 
pistillidiis eparaphysatis, capsula oblongo-ovali, erecta (gymnosto- 
ma) tenui texta obscure annulata, operculo longe rectiuscule ros- 
trato. fi. Wr ase. Me. 
On wet and calcareous rocks, Dallas County, Texas, Mr. Boll. 
Communicated by Dr. 7: P. James, 
3. Gymnostomum? Clintoni, x. sp.—Dioicum, minutulum; caule 
subflexuoso cxspitoso subsimplici, foliis siccatis erectis subtortuosis 
madefactis erecto-patentibus ovato-et oblongo-linearibus raptim 
acutatis minutim apiculatis concavo-canaliculatis opacis obscure pa- 
pillosis, margine (basi apiceque exceptis) late incurvis, costa vali- 
diuscula ad apicem vel paullulum infra desinienti, areolis minutis 
subuniformibus, perichetialibus e basi ovata lingulatis: pl. mase. et 
fructu ignotis. Didymodon Clintoni, Aust. in litt. 
Western New York, Clinton. 
A small species, chiefly characterized by the concave apiculate 
leaves broadly incurved on the margin, except at the extreme base 
and apex. Color fuscous. 
4. Pottia Pharomitrium exiguum, x. sp.—Plantz perminute gem- 
miformes, czespitulos fusco-vel rufo-incanos formantes, monoice ; 
caule perbrevi subsimplici, foliis arcte imbricatis rotundo-ovatis val- 
de concavis vulgo acutis dorso levibus, apice distincte serrato ex- 
tremo sepissime in dentibus duobus subulatis producto eo et mar- 
gine versus eum magis minusve echlorophyllosis, costa in aristam 
perlongam incanam scabram producta folliculos vel lamellas duas 
deplanatas apice valde dilatato et margine versus eum dentato 
ferente, capsula globosa in pedicello perbrevi tenui immersa exan- 
nulata, operculo majusculo e basi convexa breviter recte (semper ? ) 
rostrato, calyptra (fere ut in Bruchiis) magna usque ad medium 
on decedente mitriformi basi profunde fissa, sporis castaneis 
subpellucidis lzvissimis; floribus monoicis, antheridiis versus basin 
caulis positis folio perigoniali unico obtectis paraphysibus subela- 
vatis immixtis.—Pharomitrium incanum, Aust. MSS. olim. Poitia 
subsessilis. Sulliv. and Lesqx. Muse. Exsic. ed. 2,n. 118. Texas, 
Wright. Mlinois, Hall. Pharomitrium subsessile, Br. Eu. is twice 
