er ial ae id a SR EN Oe et oe sath in mega in pris. a 0 Oe ae a Poe 
THE MOSSES OF THE AZORES, 63 
the leaves, which constitutes two true marginal nerves, showing the 
same structure and, in the upper part of the leaf, the same broadness 
and thickness as the median costa. In B. platyloma Schw. from Madeira, 
of which I have been able to study the original specimen, preserved iti 
the herbarium Hedwig-Schwaegrichen at the Musée Boissier, the leaves 
also show a very broad margin, composed of linear, yellowish, thickened 
cells, but disposed in a single layer, a character which alone would be 
sufficient to separate the two species; besides, in B. pachyloma Card., the 
costa is much stouter and forms a much shorter and thicker point than in 
B. platyloma Schw.— The margin of B. Donianum Grev., although thick- 
ened, cannot be compared with that of B. pachyloma, which is, at least, 
thrice stouter. 
In his contributions to the Cryptogamic Flora of the Atlantic Islands 
(Journ. Linn. Soc., 1863, p. 4), Mr. Mitten too briefly describes a B. 
obovatum Mitt. from Madeira, which seems to approach B. pachyloma by 
the thickness of the terete margin, but according to the description, the 
leaves of Mr. Mitten’s species are twice as wide as those of B. Donianum, 
and almost uniformly reticulate, the lower cells being neither elongated 
nor rectangular,— features which do not agree with B. pachyloma, which 
has the leaves rather smaller than those of B. Donianum and with a dis- 
tinct basal areolation of elongated, subrectangular cells, much larger and 
looser than the upper ones. 
ANOMOBRYUM Sch. 
41. A. sunaceum (Sm.) Sch. Syn. Muse. Eur. ed. 1, p. 
382.— San Miguel (Godman).— Distrib.: Europe, 
Algeria, Cameroon, Canaries, Madeira, Central and 
South America. 
WeBERA Hedw. 
42. W. Tozeri (Grey.) Sch. Coroll. p. 67.— San Miguel 
(Godman ).— Distrib.; Europe, Algeria, Canaries, 
Madeira, North America. 
Mnivum Dill. 
43. M. uNDULATUM (Linn.) Weis. Pl. Crypt. Fl. Gott. p. 
158.— Flores (Godman). San Miguel (-Trelease, PI. 
Az. no. 1349).— Distrid.: Europe, Algeria, Madeira, 
Canaries. 
Puitonotis Brid. 
44, P. rieipa Brid. Bryol. Univ. 1. p. 17.— San Miguel 
(Hunt; Watson; Machado; Trelease, Pl. Az. no. 
