110 



ON NEW MOSSES. 



TETKODONTIUM, Schwceg. 

 T. repandum, Funk. 

 Bab. On damp ground, near the " Glon House," Gorham, White Mountains, New Hampshire. Very rum. 



ENOALYPTA, Schreb. 



E. STREPTOCARPA, lle.dw. 



Hob. Alleghany Mountains, Lancaster County, Pennsylvania, and Falls of Niagara ; sterile. 



ZYGODON, Hook, and Tayl. 

 Z. Lapponiccs, Br. and Sch. 



Hab. Crevices of rooks, Crawford Notch, New Hampshire; near the Wissahiokon Creek, Philadelphia, also 

 Mereersburg, Pennsylvania, Porter. 



Z. Mouoeotii, Br. and Sch. 



Hab. Catskill Mountains, New York; Crawford Notch, New Hampshire; and near the Wissahiokon Creek, 

 Philadelphia,, Pennsylvania. 



ORTHOTMCHUM, ffedw. 



0. obtusifolium. Var. Losqx., 0. Rogeri, Miill., neo Sohp, 



Hub. On trunks of Lombardy poplar trees, Cambridge, Massachusetts; in similar situations near Philadelphia, 

 Pennsylvania. 



0. PUMILTJM, Br. and Sch. 



Hab. On trees, near Philadelphia, Pennsylvania; Camden, New Jersey; and Cambridge, Massachusetts. 



0. PSILOCABPtJM, sp. nov. (Mss., 1858), Monoicum, dense pulvinatum, pusillum, parce diehotomum, amoonc 

 viridc, Poliis erecto-appressis, madefaetis apcrtis, ovato-lanoeolatis, ooncavis vix carinatis, margine medio 

 revolutis, apice obtusis vcl obtuso-acutis, nervo valido sub apice evanido instruetis, areolatione cellulis ovatis 

 chlorophyllosis distinctis utrinque inflatis, vix vel minutissimc papillosis, basim versus subquadratis, peri- 

 chaatialibus conformibus sed longioribus ; theca immersa, ovate, ore angusto, lam (leptoderma leiodor- 

 maque) vacua amoonc pallida, collo elongate, in vaginula incunte. Peristoma duplicis dentibus externis, 

 brovibus, crcctis, sordide albidis, granulosis, margine irregularibus, lanccolatis obtusis vel apice erosis 

 obscure articulatis. Ciliis internis 8 fuglcissimis vix dentium longitudine sequalibus; versus basin e 

 duplo cellarum serie compositis, irregulariter plicatis. Operculo conico obtuso mamillato. Calyptra sordide 

 albida nuda. 



This species differs from O. Canadense, Br. and Sch., by the smooth capsule. Although 

 at times it appears striate when empty, the capsular cells are nevertheless equal, and not at 

 all different at the apparent striae, which are produced solely by desiccation; by the internal 

 peristome, much more fugacious,— so much so that it is extremely difficult to find the 

 eilioli; also, by the softer leaves. The peristome of this species resembles much that of 

 the O. strangulatum, and yet the latter has the eilioli larger and stronger, and far less 

 fugacious than our species. 



