SALMON: SOME SPECIES OF EcTrROPOTHECIUM S20 
denticulate dorsal and ventral branch-leaves, with wider marginal 
cells towards the apex of the leaf, and by the wider areolation of 
the ventral branch-leaves. I have not seen the peristome of the 
present plant, and have therefore, in the diagnosis given above, 
copied the description given by Hampe in Miiller’s Synopsis. 
It would appear from the figure given by Montagne that the 
Cuban “ Hypnum Montagnet” is E. vesiculare Poeppigianum, 
although the specimen in the Kew Herbarium, from Montagne’s 
herbarium, is certainly Z. vesiculare type (see above). It may be 
noted that Paris (Index Bryolog. 84) cites wrongly the reference 
“Mont. in Hist. Cuba, Crypt. p. §30, t. 20, f. 1” for the true Z. 
Montagnet (Bel.) Jaeger. The latter species, from authentic speci- 
mens I have seen, is distinct from £. vesiculare —although evi- 
dently closely allied —in the more robust habit, the branches 
with more densely arranged leaves, and in the branch-leaves being 
of a different shape, hamate at the apex, and with different areola- 
tion ; the ventral branch-leaves, also, are wider and more suddenly 
acuminate. 
E. crassicaule Mitt. is—as the type-specimen in Mitten’s 
herbarium shows — different from all the plants described above, 
and presents the following characters. The plant is straw-colored, 
with here and there branches showing a rich fuscous tinge of 
color ; the stem is closely pinnate, with branches of unequal length 
which are usually curved at the apex. The stem-leaves are very 
crowded, and seen from the dorsal side of the stem are imbricate 
in several rows. They are gradually long-acuminate from a 
truncate broadly ovate or oblong base, the acumen ‘is long, fine 
and flexuous, the margin is entire (with the marginal cells very 
distinct) except in the acumen, where it is obscurely and minutely 
denticulate, or subentire. The areolation is lax, with hexagonal 
or elongate-subhexagonal cells, the walls of which become sub- 
Porose. The ventral stem-leaves are smaller and wider, and the 
cells have thinner walls. They are suddenly acuminate from a 
Subquadrate or broadly oblong truncate base; the acumen is long 
and usually filiform, and is often flexuously contorted. The points 
of all the stem-leaves are regularly hamate, being curved towards 
the ground, The branch-leaves are crowded, and strongly hamate ; 
the dorsal branch-leaves are lanceolate and ovate-lanceolate, 
attenuated to a fine acumen - the margin is entire below, minutely 
