CYETODON. 103 



in Britain, but occurs in considerable quantity on the Swiss 

 and Norwegian Alps and on the Rocky Mountains of Xorth 

 America. 



CYRTODON, Br. (Cyrtodon.) 



Named so by Brown, from the convexity of the teeth of 



the peristome. It has had a place in five other genera, by 



as many different authors, which shows how difficult it is to 



fix on such characters as will separate it from its congeners. 



Genetic Character. — Seta terminal. Peristome single, of six- 

 teen equidistant, entire teeth, marked with a central line, in- 

 cm'ved when dry. Capsule with an apophysis. Calyptra mitri- 

 form, becoming dimidiate, smooth, without fuiTOws. 



1. Cyrtodon splachnoides, Br. [Splachwid Cyrtodon^ 

 Leaves erecto-patent, lingulated; seta elongate; capsule 

 obovate; apophysis obconical. — Eng. FL p. 17. Dissodon 

 splachnoides, MUlL Syn.pt. 1. p. 1-39. 



Turf-bogs on the loftier mountains of Scotland. Tr. 

 Summer and Autumn. Growing in dense tufts, wliich may 

 be distinguished from others by their dark lurid colour. 



" Emerald moss. 

 Whose faiiy goblets the turf emboss." 



