288 Mr. R. Spruce on the Musci and Hepatice of the Pyrenees. 
zequantibus, lineari-subulatis, solidis, papillis minutissimis opacis ob- 
sitis, unde fuligine quasi oblitis, ciliis interjectis nullis seu rudimen- 
tariis. Annulus e duplici serie cellularum conflatus. Operculum bre- 
viter rostratum, rostro subinclinato. Calyptra dimidiata, glabra, cap- 
sulam fere totam obtegens. Semina minutissima, minute granulosa. 
Ab Isothecio sericeo nitore minus spectabili, ramis siccitate vix cur- 
vatis, folit nervo perdurante, pedicello sublevi, calyptra (etiam juvenili) 
glaberrima, peristomit dentibus minime (I. sericei instar) e septis in 
facie externa internaque prominulis trabeculatis, notisque aliis differt. 
Ab I. lutescente foliis solidinerviis, capsula erecta ee ut et 
peristomii interni configuratione distinguitur. 
Tas. II. 1, 2, 3. folia aucta; 4. apex folii magis aucta; 5. capsula 
aucta ; 6. peristomii pars; 7. ejusdem dens externus a latere visus, 
_ 240-ies auct. ; 8. dens peristomii Isothecii sericei a latere visus, ad id. 
augm. 
§ 3. RurescentTia. 
89. I. rufescens, Dicks. Cr. Fase. 3. t. 8. f. 4 (sub Hypno) ; 
M.P. 78. 
Hab. Z, sy, 11 monte Lhieris et juxta aquas dict. les Haue 
Chaudes, ad rupes caleareas irroratas. In Pyreneis (Bridel). 
90. I. chryseum, Schwgr. in Schultes Reise auf den Glockner, 
2. p. 864 (sub Hypno). Leskea rufescens 8. chrysea, Brid. Br. 
Univ. 2. p. 286 
Hab. Z,_4 P. oce. et c. in rupium humidarum fissuris. Col de 
Louvie. Esquierry. Bois de Sajust. 
This is the moss mentioned in my ‘ Musci and Hepatice of Tees- 
dale’ (Annals, 1844) under no. 91, Hypnum multiflorum, Tayl., of 
which, in deference to Dr. Taylor’s opinion, I considered it a form, 
It is however quite distinct from both that species and J, rufescens, 
and is not like the latter confined to calcareous rocks. 
§ 4. PoLyanrua. . 
91. I. polyanthum, Schreb. Fl. Lips. p. 97 (sub Hypno) ; 
M.P. 79. Leskea p., Hedw. Muse. Frond. 4. t. 2. 
Hab. Z, P. c. in Tilize unice trunco juxta thermas oppidi Ba- 
gnéres-de-Luchon ; necnon in sepibus prope Arreau : rarius. 
92. I. repens, Brid. Suppl. Muse. p. 181 (sub Péerigynandro) ; 
M. P. 80; Schwegr. Suppl. t. 27, et t. 246 B (sub Neckera). 
Hab. Z, inf. P. occ. et ec. in iskvorat preesertim Castanearum 
radicibus circa Pau et B.-de-Bigorre. 
Peristomium duplew : dentes externi pallidi : interius ad basin usque 
in cilia brunnea, tenuissima, seepe apice inter se anastomosantia, e 
cellularum serie singula (rarius ex parte duplici) conflata, fissum. 
93. I. striatum, Schwgr. Suppl. t. 27 (sub Pterogonioe) et 
t. 246 A. (sub Neckera); M. P. 81. 
Hab. Z, P. c. pulcherrime fructiferum in fruticum ramulis ad 
