ADDENDA ET CORRIGENDA. 



PAGE 26. Gymnostomum Donianum. Discovered growing upon clay slate in 

 Glenshira, near Inverary, Argyleshire, by the Rev. Colin Smith. 



Page 29. Of the Richardian Genus Drepanophyllum, Mr. Arnott observes, 

 that it has an upright conical membranous peristome, precisely as Leptos- 

 tomum. 



Page 34i. Tetr aphis Browniana. This has been found, by W. Borrer, Esq., 

 upon sand-rocks at Eridge, Sussex, and by the Rev. Colin Smith, near Loch - 

 Awe in Scotland. 



Page 52. Cindidotus. The Rev. Mr. Tozer, who has examined recent 

 specimens of this Moss with great care, says, " The teeth of the peristome are a 

 fine deep red, irregularly anastomosing at the very base, capillary, very long, 

 being about two thirds of the length of the theca, scarcely twisted r 1 the lower 

 half, but most closely twisted in a spiral manner through the upper part, 

 apparently round a broken portion of the columella ; but soon after the fall of 

 the operculum, the closely twisted part breaks off, and leaves the remainder 

 with the slightly twisted appearance mentioned in Muse. Brit. 



Page 76. " The Calyptra of Wdssia splachnoides is at first mitriform and then 

 dimidiate, (exactly as in Splachnum,} and is well figured by Dr. Greville, in 

 both these states." Arnott, MSS. 



Page 92. Dicranum latifolium is not Didymodon latifolius of Wahlenberg and 

 Arnott ; but is the Didymodon apiculatus of the latter. Wahlenberg's plant 

 is figured by Schwaegrichen as a Cynontodium, and is very different. Mr. 

 Arnott. 



Page 95. Mr. Arnott' s name should have been united with those of Greville 

 and Hooker in the discovery of the rare Dicranum Schreberianum at the foot 

 of Ben-y-Gloe. 



Page 105. Trichostomum funale, Schw. 1. 6. Mr. Arnott says of this, " it is 

 surely very different from Tr. patens : at all events it is by no means the 

 same as the var. (>. (of this work) found in Scotland and England, which is 

 the Tr. patens /3. of Sch waegrichen, a large coarse plant, abundant at Fon- 

 tainebleau and at Mount Louis, in the Pyrenees. Trichostomum funale is a 

 slender plant, so resembling Grimmia spiralis, that they are only distinguished 

 by the peristome." 



Page 127. Orthotrichum Rogeri. The blunt leaved variety of O- qffine, found 

 by Mr. Drummond near Glasgow, I have compared with Bridel's original 

 specimens of O. Rogeri, and find them to be the same. Mr. Arnott. 



