musci. (mosses.) G55 



so attenuated, nor the nreolation so linear; capsule cylindrical, its length only 

 2^ times its diameter, and with a perichaetial branch much longer; teeth of the 

 peristome not cleft along the centre, articulations 20-25; cilia not so granu- 

 lated, more connected from their apices downwards by cross-bars : antheridia 

 3-5, large, projecting beyond the perigonial leaves, with long paraphyses. — 

 Falls of Little River, Lookout Mountains, Alabama, Lesquereux. — Fruit rare. 



6. F. I>aIecsiB'Jaca, Bryol. Europ. Slender and much divided ; branch- 

 es numerous, elongated, somewhat julaceous ; leaves narrowly-lanceolate, con- 

 volute ; perichaHial leaves acute, the 3 inner ones recurved at the apex and long- 

 er than the ovate capsule ; operculum short; teeth of the peristome perforated 

 between the 10-12 articulations; cilia as in No. 3, but not granulated. — (F. 

 squamosa, Drum. Muse. Amtr., No. 233; Muse. Atteghan., No. 188.) — White 

 Mountaius, Oakes, James; Fulton County, New York, D. C. Eaton. (Eu.) 



64>. DICHELYMA, Myriu. Brook-Moss. (Tab. 18.) 



Calyptra dimidiate or cuculliform, entire at the base. Operculum conic-ros- 

 trate. Capsule oval or oblong, pedicellate. Peristome double ; the exterior 16 

 linear teeth perforated along the medial line; the interior 1G cilia longer than 

 the teeth, and more or less connected by cross-bars. Inflorescence dioecious. — 

 Stems slender, floating in water, sparingly divided and branched; leaves 8- 

 ranked, much elongated, with a percurrent costa, those of the periehajth very 

 conspicuous and ecostate. (Name from 6Y^a&), to divide, and eXvpa, a veil, iu 

 allusion to the cleft or cuculliform calyptra.) 



1. S>. falcatissai, Myriu. Leaves lanceolate-subulate, complicate-cari- 

 nate, falcate-sec und ; the inner perichaetial 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 Hamp- 

 shire, James: Brattleborough, Vermont, C. C.Frost. (Eu.) 



2. I>. capilliacctllSI, Bryol. Europ. Branches few, widely spreading ; 

 leaves dark or yellowish-green, subulate from a narrow lanceolate base by the 

 long-ex current costa, secund-falcate, denticulate at the apex : those of the peri- 

 chseth convolute, overtopping the oval capsule which emerges laterally; calyp- 

 tra dimidiate, extending below the capsule, and spirally convolute; cilia of the 

 inner peristome connected at their apices only. — Rivulets, Pennsylvania and 

 northward. (Tab. 18.) (Eu.) 



3. U. pallcscens, Bryol. Europ. Much like No. 2, but smaller; leaves 

 pale green, shorter, wider, more complicate-carinate, and more falcate, with a 

 larger areolation ; cilia of the inner peristome not connected by cross-bars. - - 

 (D. capillacea, Drum. Muse. Amer., No. 234.) — British America, Drummond. 



4. I>. SfalmlfatMMl, Myrin. Stems elongated, subpinnate ; branches 

 short, widely spreading; leaves erect-patent, lanceolate, complicate-carinate, the 

 costa ceasing at the denticulate apex ; capsule ovate-oval, short-pedieelled, con- 

 cealed by the broad and straight perichaetial leaves ; calyptra cuculliform, no* 

 descending below the convex-rostellate operculum ; cilia of the inner peristome 

 free, except at their apices. — Louisiana, Drummond. 



