CHRISTENSEN, ON SOME SPECIES OF FERNS. 23 
Rhizomate filiformi, repente. Stipitibus remotis, filifor- 
mibus, teretibus, nigris 1—11/2 cm. longis. Lamina deltoidea 
vel ovata, 1—1!/» em. longa et lata, glaberrima, luteo-viridi, 
in stipitem vix decurrente, rachi alata, tripinnatifida. Pinnis 
densis, inferioribus maximis usque ad 1 cm. longis, subdimi- 
diatis; segmentis secundi ordinis bi-vel trilobis, lobis erectis 
ad 1 mm. latis, uninervatis (nervo luteo-brunneo), apice 
emarginatis, marginibus undulato- crispatis. Soris numerosis 
in lobis (presertim in superioribus) terminalibus; indusio pro- 
funde bifido, ovato, basi cuneata in segmento latiore immerso, 
valvis exsertis, distincte acutis, integris; receptaculo incluso. 
Tierra del Fuego: Lago Cami, Bahia de la Espedicion. 
Shenae) 908. 
I consider this 
a very distinct spe- 
cies and cannot agree 
with FRANCHET in re- 
ferring it to H. ab- 
ruptum Hk. (H. brevi- 
frons Kze.) from the 
: Fig. 2. Hymenophyllum Skottsbergii. a, b: 2 lea- 
T ; : y phy 
W est-Indies, which ves 4/1; c part of leaf 7/1; d sorus 4/1. 
is not erisped and has 
immersed sori with round valves. FRANCHET refers hereto 
specimens from Port Otway,' Ile Clarence and Sholl-bay. 
Hymenophyllum eandiculatum Mart. 
In Southern Chile two forms of this species occur, 
1. forma typica, which I cannot distinguish from the 
Brazilian type. Stipe short, winged almost to its 
base; wing of stipe and rachis plane; fertile segments 
scarcely or slightly contracted. 
Chiloé: Rio Pudeto, Fundo S. Antonio 17. 7. 1908. 
2. var. productum (Presl) 
Syn. Sphaerocionium productum Presl, Hym. 61. 1843. 
H. caudatum v. d. B. Ned. Kr. Arch. 4: 394. 1859; 
H. caudiculatum 9 caudatum Hk. Bk. Syn. 61. 
Stipe long, wingless in the lower half or third; wing of 
stipe and rachis crisped; fertile segments much contracted, 
! Not Otway Water! 
