Mr. R. Spruce on the Musci and Hepatice of the Pyrenees. 273 
‘marginibus inflexis semi-amplexicaulia; “aliorum ramorum erec- 
tiuscula, aliorum secunda” (Schwgr.), laxe et subquadrifarie imbri- 
cata, alia recta, alia oblique incurva, ovata, ovato-lanceolata et 
ovato-acuminata, quoad apicem nunc acuta nunc obtusa, margine 
plana; omnia denticulata, nervo perbrevi quartam folii partem ut 
plurimum emetiente, nunquam ad medium usque producto, nunc lato 
et obscuro, nunc ramoso vel e basi ipsa bifurcato, instructa ; cellulis 
mediocribus, oblongis, prominulis areolata et dorso valde papillosa ; 
in cespitibus sterilibus spe pallida, flavescentia, in fertilibus autem 
fere semper saturate viridia. Florescentia dioica. Caules mascult cum 
foemineis immixti, iis tenuiores: flores numerosi, alares, ovati, foliis 
12 plus minus, ovatis, exterioribus obtusis, internis acuminatis, acu- 
mine torquato, enerviis, valde concavis, obscure denticulatis, areo- 
latione laxiori ; antheridiis haud copiosis, paraphysatis. Feminei floris 
folia pericheetialia sat numerosa, externa brevissima, interna elon- 
gata et flexuoso-acuminata, enervia, subdenticulata, laxe areolata, 
haud papillosa. Vaginula teres, viridis, apice tamen atro-rubens, 
archegoniis et paraphysibus numerosis pericheetium haud eequantibus 
onusta. Pedicellus semuncialis, levis, rufus. Capsula ovato-oblonga, 
cernua, e brunneo olivacea. Peristomii externit dentes 16, trabe- 
culati, linea media exarati, pallidi: internt membrana carinato-sul- 
cata, in processus totidem solidos, ciliis binis filiformibus interjectis, 
ultra medium fissa. Annulus duplex, revolubilis. Operculum e basi 
conica rostratum, rostro oblique curvato, capsulam fere sequans. 
Calypira dimidiata, glabra. Semina congenerum. 
Ab hoc differt H. dimorphum, Brid., foliis caulis divisionumque pri- 
mariarum squarrosis ; ramis dense foliosis, foliis arcte appressis ‘‘ unde 
ramulorum facies teres”’ (Brid.), /atioribus, obtusioribus, nervis binis 
tenuioribus et plerumque longioribus, e cellulis brevioribus areolatis, 
et maxime operculo conico. 
Obs. I have been thus particular in my description of this disputed 
moss in the hope of finally settling its name and synonymy. The 
characteristic figure of Schwaegrichen, though representing a barre 
specimen, and his description, accurate as far as it goes, place it be- 
yond a doubt that his Pterogonium heteropterum is the same plant as 
the Hypnum catenulatum of English authors ; but that it cannot be 
identical with the H. catenulatum of Schwegr. will be obvious from the 
following considerations. The leaves differ from Schwer.’s descrip- 
tion of H. catenulatum in being oblique, decurrent at the base and 
slightly embracing the stem, the margins plane (by no means “stria 
utrinque marginali brevi,” which implies a decidedly reflexed or re- 
curved margin), papillose and truly denticulate*, the nerve very short, 
not “ultra medium evanescente.”” Besides these discrepancies are 
the very important ones of a divicous inflorescence and a decidedly 
rostrate lid+, not ‘‘ conicum brevissimo rostello.”’ 
* The authors of ‘ Muse. Brit.,’ for want of examining with sufficient mi- 
nuteness, supposed that the denticulation of the margins was only apparent, 
arising from the papillosity of the surface. , 
+ Represented shorter in the ‘ Muse. Brit.’ figure than in my Pyrenzan 
specimens, and in original ones from the authors. 
Ann. & Mag. N. Hist. Ser. 2. Vol. iii. 18 
