MR. W. MITTEN ON THE MOSSES OF THE EAST INDIES. 155 
4. POLYTRICHUM, Dill. 
* Cephalotrichum, B. & S. 
l. P. perichztiale, Mont. 
Hab. In mont. Nilghiri, Perrottet! Schmid! In Himalay reg. temp. 
et alp., Sikkim, J. D. Hooker! (No. 1213, 1239, 1251, 1251 b). 
Simla, T. Thomson! (No. 1262). Nepal, Wallich ! 
2. P. THoMsow: (Mitten). Caule breviusculo, foliis strictissimis pa- 
tulis, comalibus divergentibus, e basi orbiculari subquadratave latiore 
subpellucida cellulis brevibus areolata lanceolatis apice in cuspidem 
piliformem fuscam acuminatis, lamellis brevibus obtectis, marginibus 
incurvis dentibus spiniformibus paucis serratis, perichztialibus erecti- 
oribus superne angustatis, theca in pedunculo unciali flexuoso fusco 
ovali, peristomio et calyptra P. perichetialis. 
P. pungens, Wils. in Sched. 
Hab. In Himalaye boreali-oceident. reg. temp., Simla, T. Thomson ! 
(No. 1231). 
P. perichetiali simillimum, sed foliis basi brevioribus superne spinoso- 
dentatis et cuspidiferis facile distinetu. 
3. P. TORTIPES (Wils. in Sched.). Caule breviusculo, foliis siccitate 
curvatis tortisque humidis erectis e basi lata oblongo-ovata inferne 
cellulis laxis pellucidis elongatis parallelogrammaticis areolata lanceo- 
latis lamellis obtectis marginibus incurvis dentibus remotis serratis 
apice in mucronem acuminatis, perichztialibus convolutis superne 
angustatis, theca in pedunculo rubro-fusco flexuoso suberecta incli- 
natave ovali oblonga inzequali, operculo convexo rostro brevi curvato, 
calyptra thecam totam obtegente. 
Hab. Yn Himalayz orient. reg. temp., Sikkim, J. D. Hooker (No. 1184, 
1210). 
A P. perichetiali, foliis siccitate curvatis dentatis, statim distinguitur ; 
a P. Thomsoni, foliis longioribus basi multo laxius areolatis, et theca 
inzequali. 
** — Eupolytrichum. 
4. P. DEnsıroLıum (Wils. in Sched.). Caule breviusculo unciali, foliis 
densiusculis siccitate erectis appressis, comalibus parum curvatis hu- 
midis patulis e basi subquadrata latiore superne dilatata tenuiter hya- 
lino-marginata cellulis oblongis pellucidis areolata lanceolatis sensim 
acutis lamellis obtectis margine ubique parvo spatio a lamellis discreto 
dorsoque apice serratis, perichzetialibus basi longioribus convolutaceis 
superne angustioribus, theca in pedunculo longiusculo (biunciali) 
setate horizontali subeubica. 
Hab. In Himalayz orient. reg. temp. et alp., Sikkim, J. D. Hooker 
(No. 1198, 1205). 
