380 Wilson's notes on British muscology. 



19. D. Starkii. — Probably it will be found that this is not 

 specifically distinct from D.falcatum. On the Clova Moun- 

 tains intermediate states are frequent; they differ in nothing 

 but the shape of the capsule. 



20. D.flagellare. — It now appears that no genuine exam- 

 ples of the Moss figured in Hedw. Muse. Frond., vol. iii. t. 

 1. have been found in Ireland. The specimens so called in 

 the British Flora of Hooker belong to D. Scottimmm. The 

 synonym D. montajiiim, Hedw. Sp. Muse. t. xxxv., seems to 

 be misapplied ; but there is remarkable confusion on this sub- 

 ject among continental muscologists, whose communications 

 under this name are extremely contradictory, as may be seen 

 on reference to the Hookerian herbarium. D.Jlagellare will 

 be found to differ from the D. Scottianum in the deeply bifid 

 teeth, and in the capsule which is ribbed and less contracted 

 at the mouth- 



21. D. undulatum. — No satisfactory specimens exist in the 

 Hookerian herbarium to prove that Dieran. pohjsetum of 

 Schwaegr. Si/ppL t. xli. has ever been found in Britain. 

 The British Moss is perhaps only a var. of D. scopariitm, 

 with undulated leaves. 



22. Grimmia saxicola, — This rare Moss I have found in 

 Derbyshire, (1832) near Crich, and near Rowsley. It has 

 since been found near Todmorden, Lancashire, by John 

 Nowell. 



23. G. atrata, has again been found on Snowden last year, 

 but not plentifully. It was gathered on the precipice called 

 Clogwyn du 'r arddu. 



24. Didijmodon longirostris ? Hook. Br. Fl. is most pro- 

 bably D. flexicauUs. Near Matlock in Derbyshire it is not 

 uncommon, but is always barren. 



25. Trichostomum canescens The peristome has the teeth 



united at the summits, almost the same as in Conustomutn 

 boreale. 



26. T, aciculare y, gracile. Turn. Muse. Hib., p. 67- — 

 May not this be Racomitrion cataractarmn, Bridel. Br. Un., 

 vol. i. p. 776 ? The writer of this has met with a Moss in 



