ERRATA. 
422, line 13 from foot, /or " cryptogTams " ?'ead " crypt og-ams. " 
422, line 2 from top, /or " mosse " read " mosses." 
436, line 6 from top, for " Irelet" 7'ead " Ivelet." 
437, line 17 from top, for " Wallm. " read " Wahlnb." 
438, line 1 1 from top, for " attcnatum " jvad " attenuatum." 
439, line 18 from top, for " Stritum " read " strictum." 
440, line 9 from top^ read " Hedw. " in smaller type. 
446, line 15 from foot, /or "5" read "4." 
454, line 4 from foot, /or " torfaceus " ?'ead " tin-faceus. " 
455, line 6 from foot, /or " setifolus " 7'ead " setifolius." 
458, line 9 from foot, " Zetterest " should be in smaller type. 
462, line II from top, /or " fug'as " 7'ead "fug-ax." 
471, line 15 from foot, for " Lisdb. " 7'ea</ " Lindb." 
495, line 8 from top, /or " Cullidg-e " 7'ead " Callidg-e. " 
500, line 10 from foot, /or " York," read "Yore." 
511, line II from top, /or " Punchars" 7'ead " Punchards." 
516, line 6 from foot, /or " erythrocarpon " i-ead " crythrocarpum. 
541, line 14 from foot, /or " polycarpon " read " pol3 carpum." 
542, line i4from top, /or "subspiioericarpon"rmr/"subspha3ricarpuin 
551, line 9 from top, /or " woode " read " woods." 
564, line 5 from top,^r " nitidum " read " nitidulum." 
566, line 14 from foot, /or " Clyind " 7'ead " Cj-lindrothccium." 
570, line 12 from foot, /or " purpuraceus" 7'cad " purpurascens." 
585, line 6 from top, /or acuii/oliuni " read "/fwdr/n' ///;//." 
590, line 10 from top, for " Wavnst " read " Warnst." 
590, line 2 from foot, /or " incurratus" read " incurvatus." 
599, line 5 from foot, /or " Dum. " read " Corda." 
600, line 8 from foot, /or " Ancura " 7-ead " Aneura." 
606, lines 12 & 13 from foot, /?>r " Belpharozia " rmfi' " Blepharozia. 
608, line 5 from top, /or "(Q.)" read " (L.)." 
609, line 10 from top, /or " N. " read " W. West." 
616, line 7 from top, /or "Slope" 7'ead "Slape." 
628, line 5 from foot, /or " Lopiiovia " 7'ead " Lophozia." 
629, line 8 from foot, for " 1852 " 7'ead " 1882." 
