120 Salmon . — On the Genus Fissidens. 
his tribe Skitophylleae, and this arrangement seems on the 
whole the most satisfactory, as the genera here associated 
are certainly, in their vegetative characters, closely related. 
Geographical Distribution. The number of species of 
Fissidens , as mentioned above, is nearly 500, and these are 
distributed throughout the tropical and temperate regions 
of the world. 
Taking the main divisions of land, and finding the total 
number of species, and the number of endemic species, for 
each, we have the following table : — 
Europe 
Total No. 
of species. 
32 
Endemic 
species. 
13 
Asia ... 
92 
84 
Africa 
159 
140 
North America 
74 
49 
South America 
118 
106 
Pacific 
... 60 
50 
There is thus, apparently, a large proportion of endemic 
species ; on the other hand some species have a very wide 
distribution, e.g. the three commonest British species F. taxi - 
folius , F. adiantoides, and F. bryoides. 
F. taxifolius is common throughout Europe and North 
America ; occurs in Asia in India and the Caucasus ; and 
in Africa in the Canary, Madeira, and Mascarene Isles. 
F. adiantoides is found throughout Europe ; in Japan and 
Hong Kong, Asia ; Algeria, Africa ; in the East and West 
of North America, and Canada ; and in New Zealand and 
Tasmania. F. bryoides occurs in Europe, Asia, Africa, North 
America, Australia, and New Zealand. 
During my studies, I examined the species of Fissidens 
in the Kew Herbarium, and the following notes refer (with 
one exception) to specimens found there. 
Fissidens aequalis , sp. nov. (Figs. 59-68). 
(F. crispans, Sch. ms. in Herb. Kew, pro parte.) 
Terricola, dioicus, laxe caespitosus, flavescenti-viridis. Caulis 
