descriptions in the work above quoted. That author suspects 

 that the Bartramia gigantea of Schwaegrichen's Suppl. v. ii. 

 t. 63. may belong to the same genus as the present ; but as 

 the fruit of that plant is unknown, this point cannot at pre- 

 sent be determined. 



The character of this genus, as its name implies, is de- 

 pendent upon the spirally involute nature of the teeth of the 

 peristome, as seen when dry ; in this particular bearing much 

 affinity with the Taylor'ia splachnoides. In other respects 

 the essential characters are scarcely different from those of 

 Hypnum, from which however it may be distinguished by its 

 habit ; and in that it is more nearly allied to the Barlrarnicc. 



Fig. 1. Plant {nat. size). Fig. 2. Leaf. Fig. 3. Perichsetium and cap- 

 sule, with its calyptra. Fig. 4. Operculum. Fig. 5. Peristome. 

 Fig. 6. Teeth of the outer ; and Fig. 7. Teeth of the inner peri- 

 stome. Fig. 8. Portion of the columella with the spongy extre- 

 mity which filled the operculum. Fig. 9. Seeds : — more or less 

 magnified. 



