64 Drxon: NEW AND RARE AFRICAN MOSSES 
This view is amply borne out by the facts of bryological 
distribution, so far as they have been studied, and is accentuated 
by some of the records which will be found below. For example, 
several of Mr. Wager’s Transvaal gatherings here referred to 
are identical with species hitherto known only from the equatorial 
regions; a further example is that of Microthamnium sapro- 
adelphum from Mauritius, hitherto known only from a single 
station in the Cameroons; while Rigodium dentatum from Pretoria 
has at present only one African congener, and that a native of the 
equatorial zone. The more or less continuous, elevated forest 
belt connecting these regions, and the absence of any very pro- 
nounced geographical barrier, either mountain range, water, OF or 
desert, may perhaps help to account for this. The bryological 
flora of Southeast Africa, especially between the fifth and 
twenty-fifth parallels of south latitude, is, however, almost um- 
known, and promises an interesting field of discovery. 
The facts above referred to render the description of “geo 
graphical species” even more dangerous than in other parts of the 
which obtain in the case of most of the continents, e.g., Europe q 
and ‘North America, Europe and North Africa, Oriental Asia and 
graphical areas appears to be very small. 
Leucotoma Hotsti Broth. « 
Kilimanjaro, Bishop Hannington, Mitten’s herbarium. 
A small, slender plant, which agrees exactly with an ori 
specimen of Holst’s at Kew, determined by Brotherus, 
as they are in Hannington’s plant. 
