xxxiv ADDENDA ET CORRIGENDA. 



Page 135. I find the Calyptra ofNeckera pennata to be mitriform; and that, in 

 general, among Mosses, when the capsule is immersed among the perichcetial 

 leaves, the calyptra is mitriform. Mr. Arnott. (Hence it is, that Mr. 

 Arnott, in his Dispositio Muscorum, has removed this plant to Dationia ; hut 

 its separation from .2V. pumila and 2V. crispa is very unnatural.) 



Page 137. Upon Anomodon curtipendulum, the Rev. Mr. Tozer remarks, 

 " Stems trailing, irregularly divided, sometimes rather pinnate. Leaves 

 crowded, of a yellowish green colour, shining, concave, ovate, hut lengthened 

 out into a very acute and serrated point. Perichcetial leaves nerveless, entire. 

 Seta at first arcuate, but at length becoming twisted and erect, and I have 

 always found it more than twice as long as the perichaetium. It is not com- 

 mon on the lower parts of Dartmoor, but abundant upon the higher, and is 

 generally barren. In Wistman's wood, near Two Bridges on Dartmoor, it 

 gives to the oaks a very remarkable appearance. Stunted branches, not larger 

 than the wrist, often appear as large as the human body, from the very 

 luxuriant manner in which the Moss envelops them, frequently growing from 

 8 to 12 inches long, and producing thecee in the greatest profusion. I have 

 never seen it of a blackish or dark green colour." 



Page 157. Hypnum refiexum. For " Dr. GrevUle" read "Mr. Arnott," who 

 discovered the Ben Lawers station for this plant, at the time that he found the 

 Hypnum dimorphum. 



Page 164. Hypnum rufescens. Add, found in fine fructification near Loch- 

 Awe, Argyleshire, by the Rev. Colin Smith. 



Page 188. Hypnum scorpioides. Mr. Tozer finds two nerves, sometimes very 

 distinct, at other times obscure, in the leaves of this plant, which shows how 

 liable this, like most aquatic plants, is to vary. 



Page 190. Hypnum Crista-castrensis, is found, by the Rev. Colin Smith, grow- 

 ing on stone walls near Loch- A we, where the country is little elevated above 

 the Lake. 



