(247 ) 
when moist; leaves when dry, spreading flexuous, more or 
less complanate, ovate-lanceolate, the lateral a little larger, 
about 1.3 mm. long and 0.5 mm. wide, without border, ser- 
rulate two thirds down; costa double, the bases separated by 
width of 2 or 3 cells, the two parts somewhat diverging 
upward, serrate on the back and vanishing above the middle, 
the apices ending in short spines; leaf-cells quite uniform 
throughout; the median about 4o » long by 6 w wide; peri- 
chaetial leaves erect-flexuous, ecostate, the inner mostly a 
little longer than stem-leaves, from an ovate base gradually 
narrowing to a long-lanceolate apex or sometimes to a short, 
nearly entire blunt apex; pedicel smooth, up to 2 cm. high; 
capsule short oblong, more or less horizontal, 0.75 mm. long, 
with erect, short-beaked lid a little shorter, when dry curved 
and contracted below the mouth; outer teeth of peristome 
furrowed and hyaline along the middle, finely cross-striate 
below, papillose at apex, inner segments papillose, scarcely 
or not split along the keel, a little shorter than the teeth; 
calyptra smooth, lacerate at base; spores smooth, 12 # in 
diameter. 
Trail between San José and Apolo, Feb. 12, 1902, 1350 
meters (2042). This species is near planiuscula and cerrhosa. 
From the first it differs in its rather narrower leaves, longer 
seta, different capsule and perichaetial leaves; from the 
second in capsule not strumose, leaves not hamate at apex of 
stem and seta longer. 
HooKERIOPSIS ASPRELLA (Hampe) Broth. 
Santa Anna near Aten, 1670 meters, on rock, July 31, 
1902 (1953). 
HooKERIOPsIS CRISPA (C. M.) Jaeg. 
Santa Anna, 1670 meters, on rock along stream, July 30, 
1902 (1964). Trail between San José and Apolo, Feb. 12, 
1902 (2943). Santa Cruz, 1525 meters, Aug. 25, 1902 (2944). 
HooxkERIopsis UNDATULA (C. M.) Broth. 
Mouth Rio Pelichuco, 930 meters, April 27, 1902 (2758). 
HooxkeEriopsis rncurvA (Hook. et Grev.) Broth. 
Santa Barbara, Apolo region, 1650 meters, Aug. 30, 1902, 
on decaying log (1963). Rio Cocos, 1050 meters, on log, 
