ix, c. 3 Robinson: Distribution of Philippine Mosses 217 
natural division, from a botanical point of view; the species 
from near Manila have been counted as definitely west coast; 
those from the northeastern part of the province have been 
counted as east coast when they have also been found in other 
localities, whether east or west ; when this was their only Philip- 
pine station of record, they were omitted altogether, as were those 
of Nueva Ecija and Batangas (one only), this omission indi- 
cating uncertainty in the mind of the writer as to the exact 
point at which the dividing line should be drawn. Bryologically, 
Bulacan may prove to be east coast, as the hill country in its 
eastern part, almost uninhabited, will yield far more species 
should collections be made there than can the much better known 
and populous plain to the west. 
The figures are as follows, but it should be noted that the 
totals do not correspond to the sum of the separate columns, 
for while the first three columns are mutually exclusive, the 
second must and the third may be included in the fourth. Also 
species are included in the total that do not appear in any 
of the other columns, for example when a species is known only 
from Benguet and Zambales. 
1 
Endemic 
in one 
Philippine 
locality. 
Only one 
Philippine 
station, but 
outside dis- 
tribution. 
Extending 
to more 
southern 
islands 
within Phil- 
ippines. 
With extra - 
Philippine 
distribu- 
tion and 
one or more 
Philippine 
stations. 
Total. 
Species of mosses found in the west- 
ern provinces above named, but 
not in the eastern 
6 
5 
16 
22 
32 
Species found in the eastern prov- 
inces, but not in the western 
15 
10 
32 
46 
70 
Species found in both eastern and 
western provinces 
18 
18 
24 
In view of what has previously been stated, this difference 
seems surprising, but while the details are much more likely to 
be modified by future collections than in any of the cases pre- 
viously considered, it is highly probable that there will remain 
a very considerable number of species known only from one or 
the other slope . 5 The figures do appear to argue strongly against 
one opinion based upon flowering plants, namely that the species 
of eastern Luzon are the more likely to be found in the more 
southern islands, and are also more likely to extend without the 
5 See Philip. Journ. Sci. 6 (1911) Bot. 190, 191. 
