viii INTRODUCTION. 



The number of Mosses, included in the present work, is 290 ; 

 and of these the most remarkable kinds, which, we believe, have 

 not yet been found upon the Continent of Europe, are Gymno- 

 stomum viridissimum, Griffithiamim and Donianum, Grimmia 

 leucophcea and unicolor, Weissia Templetoni (?J, Trichostomum 

 ellipticum, Glyphomitrion Daviesii, Didymodon nervosum and 

 jftexifolium, Orthotrichum Drummondii, Daltonia splacknoides, 

 Bartramia arcuata and Hookeria Icete-virens. 



On the other hand, the most striking species contained in the 

 Floras of Continental writers, and which Great Britain cannot 

 yet boast of possessing, are, Voitia nivalis, Pyramidula tetragona, 

 Anictangium aquaticum and pulvinatum, Grimmia plagiopodia, 

 Didymodon pallidum, Splachnum rubrum and luteum, Systytium 

 splachnoides, Tayloria splachnoides, Dicranum ambiguum, Schra- 

 deri and cylindricum, Polytrichum capillare and Icevigatum, 

 Fontinalis falcata, Neckera cladorhizans, Cinclidium stygium, 

 Mnium turgidum, and Bryum squarrosum. 



From the above remarks it will be judged, as we might ex- 

 pect from the vicinity of the two countries, that the Muscologia 

 of Britain is very similar to that of the central and Northern 

 Continent of Europe. It will excite more surprise to find that 

 the distant Continent of North America, especially in the cor- 

 responding parallels of latitude, presents a Muscologia even more 

 similar to ours than that of Europe. Mr. Seoul er has brought 

 from the opposite side of the New World, from the Columbia 

 and Nootka, many Mosses, which prove to be the same as those 

 of our own country ; and those who will be at the trouble to turn 

 to the pages of the Botanical Appendix of Captain Franklin's 

 Journey to the Polar Sea, from lat, 54., will see at once how 

 analogous are the Mosses of that country to the British. The 

 indefatigable Botanists of the present, or second, overland 

 Expedition through the same regions, have already collected still 

 more important information on this head. Our invaluable friend, 



