(250 ) 
Tuurpium BrasILiense Mitt. 
Rio Pelichuco, 2100 meters, on log, April 27, 1902 (2778). 
Near Aten, 1700 meters, June 18, 1902, onthe ground (2005). 
Near Aten, Aug. 16, 1902, 0n rock (2953). These specimens 
do not seem to differ in any way from the type specimens, 
but Mitten’s description is evidently incorrect (Jour. Linn. 
Soc. 12: 579) for the type shows the majority of the cells not 
or scarcely elongated and highly mamillose, with the apex of 
the cells in leaf below divided into two or three points and be- 
coming often spine-like in upper leaf on back. Iam unable 
to distinguish 7. Antllarum Besch and 7. pseudorecognitum 
Hpe. from above. The Bolivian specimens are similar to 
those of J. Weir, no. 376, near Pacho, Andes Bogotensis, 
which are called de/icatu/um, but they ali differ from the 
latter in having smaller leaves on the branchlets, the para- 
phyllia rougher with more or less spine-like papillae and 
mostly with rather narrower cells toward the base of the stem- 
leaves. It would seem that true de/icatulum does not occur 
in South America. 
THUIDIUM FIRMULUM C. M. 
Machariapo Rio, 1100 meters, April 8, 1902 (2015). 
RIGODIUM LEPTODENDRON C, MM. 
Apolo, on rocks, 1§00 meters, July 7, 1902 (2012). 
Potamium longisetum sp. nov. 
Autoicous: in loose, dark-green tufts about 4 cm. high, 
attached to rocks in flowing water; primary stems creeping, 
mostly denuded of leaves; secondary stems erect, simple or 
with few branches, about 3 mm. wide, with the complanate 
leaves spreading, either wet or dry; leaves ovate to short ob- 
long-lanceolate, acute, 2 mm. long by 0.8 mm. wide, shortly 
bicostate, very concave, entire, somewhat reflexed on borders : 
leaf-cells toward apex narrowly rhomboidal to hexagonal, 
below narrow and elongate, up to 5 4 wide and Sou long, 5 
or 6 cellsin basal angles enlarged and colored with somewhat 
yellowish, thick-walled cells extending across leaf-base ; peri- 
chaetial leaves a little smaller and narrower pointed than stem 
leaves, ecostate with apex sometimes slightly serrulate; seta 
