MUSCI. (MOSSES.) 55 
age a nor the areolation 80 — irene Hibeesei its length only 
teeth of 
vi of I Little River, Lookout Mountains, Alabama, Lesquereur. — Fruit rare 
- Dalecarlica, Bryol. Europ. Slender and much divided; branch- 
es numerous, elongated, somewhat julaceous; leaves narrowly-lanceolate, 2 »n- 
pe 
between the 10-12 articulations ; cilia as in No. 3, but not granulated. — (F. 
rer Drum. Muse. Amer., No. 233; Musc. Alleghan., No. 188.) — White 
Mountains, Oakes, James; Fulton County, New York, D. C. Eaton. (Eu.) 
60. DICHELYMA, Mprin. Broox-Moss. (Tab. 18.) 
Calyptra dimidiate or cuculliform, nerly at the base. rome conic-ros- 
trate. ag oval or oblong, pedicellate. Peristome double; the exterior 16 
linear teeth perforated along the aa line ; the pepe ee ‘ls ———e than 
the tee ch, and more or less connected by cross-bars 
Stems ea, floating in water, sparingly divided “a pina leaves 3- 
ranked, much elongated, with a percurrent costa, those of the pericheth very 
conspicuous and ecostate. (Name from é:xd@, to divide, and €Avpa, a veil, im 
allusion to the cleft or cuculliform calyptra.) 
1. D. falcatum, Myrin. Leaves lanceolate-subulate, complicate-cari- 
nate, faleate-secund ; the inner pericheetial leaves very much elongated, closely 
wrapped around the lower half of the long pedicel ; capsule oval-oblong ; inner 
peristome a tessellated truncated cone; calyptra dimidiate, elongated, clasping 
the pedicel. — Head-waters of the Saco River, White Mountains, New Ham 
shire, James: Brattleborough, Vermont, C. C. Frost. (Eu.) 
2. D. capillaceum, Bryol. Europ. Branches few, widely spreading ; 
leaves dark or prone subulate from a narrow lanceolate base by the 
long-excurrent costa, secund-faleate, a at the apex; those of the peri- 
cheth convolute, overtopping the oval capsule which emerges laterally ; calyp- 
tra dimidiate, BL is below the plang and spirally convolute ; cilia of the 
inner peristome connected at their apices only. — Rivulets, Pennsylvania and 
northward. (Tab. 18.) (Eu.) 
3. D. palléscens, Bryol. Europ. Much like No. 2, but smaller; leaves 
pale green, shorter, wider, more complicate-carinate, and more faleate, with a 
i ili e nected eross-bars 
liad by the broad and straight pericheetial leaves; calyptra 
descending below the convex-rostellate operculum ; cilia of oa inner os perio 
free, except at their apices. — Drummond. 
