128 HISTOllY OP BRITISH MOSSES. 



On walls and rocks. Pr. September to March. Very 

 much resembling Tortula fallax, so much so, that " it will 

 require an experienced eye to distinguish it without having 

 recourse to the peristome.''^ A variety with cylindrical 

 capsules has been found near Beaumaris, and at Dunkerron 

 in Ireland. 



8. DiDYMODON TRiFARius, Sw. {Three-raulced B'ldymo- 



don.) Leaves rather distant, somewhat trifarious, lanceolate, 



obtuse, carinate, with the nerve scarcely reaching to the 



point ; capsule oblongo-ovate, erect ; lid rostrate. — Eng. Fl. 



jo. 30. Trichostomum trifarium, Miill. Syn.pt. \. p. 574. 



On moist banks. Tr. Winter and early Spring. Neaj-ly 

 allied to the preceding species, from which it may be known 

 " by the shorter, more patent, far less rigid, more distantly 

 placed and trifarious leaves.'" It varies considerably in size. 



9. DiDYMODON cuispuLTJs. {Obscure Didymodon.) Stem 

 short, scarcely branched; leaves erect, lanceolato-subulate, 

 with entire and slightly incurved margins, channelled above, 

 concave and rounded at the summit; nerve suddenly in- 

 flexed towards the apex and excurrent; capsule oblongo- 

 ovate, erect; lid rostrate. — Eng. Fl. p. 30. Trichostomum 

 crispulum, Milll. Syn.pt. I. p. 571. 



On maritime limestone rocks in Anglesea, and on Orme's 



